BY JOHN L. LECONTE, M

The species described in Ihe présent memoir hâve ail been previously made known by me in American publications cited below; nevertheless, being mostly remarkable for their strange forms or singular affinities, I hâve thought that a more close knowledge of them would be of interesl to the entomologists of Europe.

I hâve therefore, with great pleasure, availed myself of the libéral offer of my friend, Mr. J. Thomson, to publish them by means of the very favourable opportunity afforded in the présent splendid work. The plates being published at intervais, and the text prepared at a great distance from the place of publication, it will be impossible for me to place the groups of insects represented in a natural order; but in each part of the memoir, the species contained in it will be arranged in accordance with the System usually adopted by entomologists. For this reason, I will place first :

PLASTOCERUS, Lee.

1. P. ScHAUMii, piceo-castaneus, helvo-pubescens, capite thoraceque pilis longioribus erectis densius vestitis, illo scabro, hoc antrorsum angustato, lateribus sinuatis, angulis posticis elongatis divergentibus, dense punctalo ; elytris striis vage impressis, interstitiis subrugosis ; pedore longius cinereo-pubescente. Long. 14 mill. — Tab. XIH, fig. 1.

Leconte, Trans. Am. PMI. Soc, X, 502. San Diego, California; flying just before sunset, near the shore of the bay, in May and June. The female diflfers from the maie by the pectination of the antennae being very short, so that those organs become scarcely more than serrate ; the elytra also are more flattened and slightly déhiscent.

The genus Plastocerus belongs to the tribe Campijlini of Elateridœ, and forms with Aphricus, Aplastus and Euthysanius, Lee, a small group distinguished by the labrum being indistinct. Thèse four gênera are ail found in California, and thus far Plastocerus alone is represented in any other part of the world. The gênerai appearance of thèse four gênera is very différent : Aphricus, with the front margined and the mandibles slender and prominent, the antennse moderately serrate, has the form of i. 31

body of Cardiophorus; Aplastus resembles entirely a slender Corymbites, and bas lonjî, serrate 11-jointed antennae; Plastocerus bas tbe antennse 11-joinled and strongly pectinate, and Ibe female not very différent in form from tbe maie; Euthijsanius bas tbe antennse 12-jointed, but otberwise is similar in form to Plastocerus ; but the female bas a very long abdomen, no wings, and sbort elytra obliquely truncated at the tip, only covering the base of the abdomen ; the antennae are 12-jointed and only serrate in that sex.

SCHIZOPUS, Lee.

Antennœ, ii-articulatœ, articulis ^ — iO latioribus triangularibus , iimo ovato ; dypeus minutus in f'ronte emarginata receptus, labriim majusculum antice subémarginatum, mandibulœ emarginatœ. Mentum trapezoideum transversum (ligula hrems, transversa, coriacea, palpis deficientibus) ; palpi maxillares brèves cylindrici, articulis subœqiialibus ; ocuU médiocres ovales. Coxœ anticœ magnœ transversœ, conicœ, trochantino nullo; mediœ eis approximatœ majusculœ distantes; tarsi tibiis breviores, articulis 1 — 3 subtus breviter, ito autem longe bilobatis, ultimo prœcedentes très longitiidine œquante, unguibus ad apicem fissis. Abdomen articulis duobus primis arcte connatis, 5^o emarginata, 6to prominulo valdee marginato, Tmo minuto parum conspicuo.

A remarkable genus, which by its form and color recalls certain Gallerucites of the family Chrysomelidœ, while the structure of the abdomen is equally suggestive of Psephenus. ïhe head is small ; the thorax is gradually narrowed in front, closely applied to the elytra, and slightly sinuate at base. The scutel is trilobed, with the middle lobe produced into a point. The elytra are wider than the thorax, oblong, rounded at the tip, coarsely but densely punctured. The legs are moderate ; the anterior tibias are terminated by very short spurs, but I can see none on the middle or posterior tibise. The anterior coxae are large, leaving only a very short prosternum, which extends between them, and abuts against the declivous mesosternum ; the metasternum is short and flat, forming an angle with the mesosternum, which widely séparâtes the middle coxae; the episterna of the metathorax are flat, broad, and project in front; the posterior coxae are suddenly dilated internally, truncate at tip, with the inner margin oblique; their anterior margin is curved, with the concavity forwards, and the mesosternum is sculptured with a Une parallel to this margin. The joints of the abdomen are nearly equal in length: the first and second are connate; the third and fifth are a litde shorter than the fourth ; the sixth is deeply emarginate, very small, and is visible only within the emargination of the fifth. The epipleurae are obsolète behind.

It will appear from the assemblage of characters detailed, that this genus will be properly enrolled as a new family, Schizopodidœ, to be placed between Dascyllidœ and Cyphonidœ, completing the line of affînities manifested by the Parnidœ, through Psephenus, a genus of the Atlantic States, with the serricorn type of Coleoptera in the two familles named above.

2. S. L^Tus, oblongus, viridi-œneus, subtiliter albo-pubescens, capite thoraceque confertissime scab'ropunctatis, hoc convexo canaliculato , latitudine duplo breviore, antrorsum angustato, lateribus late rotundatis et late prœcipue postice subdepressis ; elytris lœte sanguineo-rufis, confertim minus subtiliter rugose punctatis, et subtilius parce punctatis, sutura viridi-œnea; tibiis tarsisque testaceis, antennis fuscis ad basin testaceis, articulo imo viridi-œneo. — Long., 16 1/2 mill. — Tab. XIII, fig. 4.

Leconte, Proceedings of the Academy ofNatural Sciences of Philadelphia, 1858, p. 71, One spécimen from Arizona ; habits unknown. -àX

ENDEODES, Lee. ^^

3. E, BASALis, opacus, sanguineus, brcvissime puhcscens, capite fusco, thorace latitudine longiore. pos-

ARCANA NATURiE. 123

tice angustato, basi producto et emarginato; elijtris depressis, thorace longiorihus , atris , basi sanguineomarginatis. —Long., 3 1/3 mill. — Tab. XIII, fig. 6.

Âtelestus hasalis, Lee, Proceedings of the Academtj of Natural Sciences of Philadelphia, VI, 168. San Diego, California ; under seaweed. The red margin of the base of the elytra extends along the side almost to the middie.

This genus, while agreeing with Atelestus in the absence of wings and the shortness of the elytra, difPers essentially in the anterior tarsi of the maie, the second point of which is obliquely prolonged above as far as the end of the third joint, precisely as in many species oî Anthocomus : the epistoma is membranous and quite distinct, while in Atelestus it is described as indistinct. Thèse two characters are sufficient to warrant the Californian species being considered as a distinct genus.

To this genus also belong Atelestus abdominalis and collaris, Lee, loc. cit., also from the sea coast of California ; in the first, the head and thorax are red; in the latter, the thorax alone.

EDROTES, Loc.

4. E. vENTRicosus, iiigev nitidus, pilis longissimis albidis versus latera lanuginosus, capite thoraceque impunctatis, hoc versus latera rugis paucis elevatis notato ; elytris parce subtiliter punctatis, punctis versus marginem muricatis ; pedibus longe pilosis. — Long. 13 1/2 mill. — Tab. XII, fîg. 8.

Leconte, Annals of the New York Lijceum of Natural History, V, 141. Colorado Désert, California. Congeneric with this species is Pimelia rotunda, Say, Journ. Acad. Nat. Se. Philadelphia, III, 251, a much smaller and more strongly punctured species found at the eastern base of the Rocky Mountains, and represents in North America Epiphysa of South Africa ; for a fuU description of this and the other gênera of Tenebrionidœ hère mentioned, the student is referred to the fifth volume of the admirable work of Lacordaire on the gênera of Coleoptera.

TRIOROPHUS, Lee.

5. T. NODicEPS, ater, minus nitidus, capite subtilius , postice densius, punctato, lateribus margine tenui, reflexo, fronte tuberculo magno obtuso munita; thorace transverso punctato, basi marginato, lateribus rotundato, angulis anticis porrectis ; elytris ventricosis rotundatis, thorace plus duplo latioribus, d-seriatim punctatis. —Long. 8 mill. — Tab. XIII, fig. 7.

Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, VI, 446. Eagle Pass, Rio Grande, Texas. A genus belonging to the Tentyride group of Tenebrionidœ, and containing besides the one hère described, three Californian species, T. lœvis, T. rugiceps and T. punctatus, Lee, Annals of the Lyceum of Natural History of New York, V, 141, 142.

DACODERUS, Lee.

6. D. STRiATicEPs, castaneus nitidus, capite thoraceque supra et subtus profunde striatis, fronte arcuatim excavata, et ad apicem foveata; thorace latitudine longiore, postice paulo angustato, angulis anticis valde rotundatis, posticis subrectis rotundatis, dorso canaliculato , ad médium transversim maxime excavato, et tuberculo rotundato haud prominuloin latereipso munito [quapropter latus biincisum apparet); elytra plana elongato-ovalia, thorace paulo latiora, ad basin emarginata, profunde minus dense punctata, stria suturali exarata; abdomine parce profunde punctato. — Long. 4 mill. — Tab. XII, fig. 6.

Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, 1858, p. 75. Fort Yuma,

124 ARCANA NATURiE.

at the junction of the Colorado and Gila rivers, California, iinder bark of a species oï Popuhis; very rare.

This genus is placed by Lacordaire near the Adelostomites, forming a distinct tribe. It is, in fact, a very abnormal form and differs from ail the other gênera of Tenebrionidœ as at présent limited, with one exception, by the anterior cotyloid cavities being confluent. The exception is the genus Cononotus, Lee, which is allied to Apocrypha, Esch.

ARtEOSCHIZUS, Lee.

7. A. cosTiPENNis, rufo-picea, opaca, brevissime flavo-setosa, thorace, capite angustiore elongato, siibquadrato ; elytris ellipticis thorace duplo latioribus, foveis seriatis cancellatis, interstitiis 2°, 4°, 6° marginalique magis elevatis ; antennis crassis perfoUatis. — Long. 4 mill. — Tab. XIII, fig. 11.

At the western edge of the Colorado Désert of California, near Vallecitas, under stones. ïhis genus is closely allied to Stenosis, Herbst. (Tagenia, Latr.j, but difîers by the eleventh joint of the antennae being smaller and closely applied to the tenth, by the from of the raentum and by the very narrow eyes on the superior surface of the head.

CERENOPUS, Lee.

8. C. CONCOLOR, ater nitidus, capite marginibiis reflexis, transversim tmpresso, vertice subelevato; thorace latitudine longiore, ovato, postice paulo angustato, ad latera parce subtiliter punctato, ante basin vage foveato; elytris pone médium paulo latioribus, foveis seriebus 8 marginalique digestis; tibiis anticis processu externo apicali brevi rotundato. — Long. 19-22 mill. — Tab. XII, fig. 3.

Leconte, Annals ofthe Lyceum ofNatural History ofNew York, V, 143. Colorado Désert of California ; rare. Cape San Lucas, Lower California, abundant. The maies of this genus hâve the anterior thighs much thickened, the anterior tibise curved and denticulate internally, and the posterior thighs toothed; in this species, the anterior tibise are besides deeply sulcate externally, and the posterior thighs irregularly serrate beneath.

The genus is confined to Southern California and Arizona, from which one species Ç. bicolor extends into upper Texas. It is placed by Lacordaire in the tribe Scaurides, near Centrioptera, Mann., from which it difiFers by many characters, but more particularly by the small size of the mentum.

ELEÔDES, Esch.

9. E. TEXANA, oblonga, nigro-picea, parum nitida, capite punctato; thorace subtiliter parce punctulato, transverso, capite quadruplo latiore, supra parum convexo, lateribus Me depressis et paulo reflexis, subrugosis, maxime rotundatis postice subsinuatis, ad basin truncato, angulis posticis redis, anticis acutis acuminatis ; elytris thorace angustioribus, parallelis marginatis, dorso planis postice declivibus (maris br éviter acuminato-productis , feminœ subacutis), sulcatis, sulcis punctatis, interstitiis parce punctatis. — Long. 41 mill. — Tab. XII, fig. 5 d.

Leconte, Proceedings ofthe Academy ofNatural Sciences of Philadelphia, 1858, p. 182. Texas ; this belongs to group II, of my arrangement of the species oi Eleodes of the United States (loc. cit.). It is allied to E. suturalis, Lee. (Blaps suturalis, Sayj, but is much larger and comparatively narrower, with the sides of the thorax and elytra still more strongly margined. The spurs of the anterior tibiœ are equal slender and acute in both sexes; the anterior thighs are armed with an acute tooth in the maie and an obtuse one in the female,

The genus Eleodes now embraces a large number of species of very varicd form. Some of thèse

ÂRCANA NATURE.. ^25

hâve already been figuredby Eschscholtz in the Zoologischer Atlas ; the two hère described serve yet farther to illustrate the protean character of the genus.

10. E. ARMATA, elongata, nigra, nitida, thorace subtiliter minus dense punctato, lateribus rotundatis, postice subangustato, angulis posticis obtusis; ehjtris ovalibus, convexis, apiceparum aUenuatis,punctis plus minusve distinctis seriatis, paucisque interjectis ; femoribus omnibus subfus dente longo acuto armatis.— Long. 23-32 mill. — Tab. XII, fig. 2.

Leconte, Annals oftheLyceum of Natural History of New York, V. 134. Colorado Désert, California. The maie is narrower and more acute behind, with the posterior tibiae sinuate. This species with F. femorata, which has the teeth of the thighs short and obtuse, forms group XV of my arrangement of the species of the genus above mentioned.

EMBAPHION, Say.

11. E. CONCAVUM, elongato-ellipticum, nigrum, thoracis et elytrorum marginibus altissime reflexis, illo antrorsum angustato, disco parce punctulato, lateribus parcius subtilius muricatis, elytris subtiliter muricato-punctatis, brevissime hispidis. — Long. 19 mi!!.; lat. 10 mi!l. — ïab. XIÏI, fig. 10.

Leconte, Proceedings ofthe Academy of Natural Sciences of Philadelphia, VI, 446. Texas. This species resembles in ail its characters E. muricatum, Say, but differs by the longer and narrower form and the moresuddenly reflexed and almost perpendicular sides of the elytra.

PELECYPHORUS, Sol.

12. P. CARiNATus, niger opacus, thorace longiore quadrato, medio elevato et varioloso, lateribus crenulatis, subreflexis variolosis; elytris marginatis rotundato-ovatis, apice acutis valde declimbus, dorso rugosis, costa utrinque abbreviata cum margine parallela. — Long. 21 1/2 mi!!. — Tab. XII, fig. 1.

Leconte, Annals of the Lyceum of Natural History of New York, V, 128. San Felipe, at the base of the mountains limiting the Colorado Désert westwardly.

13. P. ELATUS, niger, capite excavato ; thorace latitudine breviore, lateribus antice latissime reflexis medio angulatis, angulis omnibus distinctis; elytris oblongo-ovalibus, postice subacutis, convexis, thorace plus duplo latioribus, minus profunde rugose punctatis, sutura lineisque tribus lœvibus, humeris minutis porrectis. — Long. 35 mill. — Tab. XII, fig. 7.

Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, VI, 445. Texas. Allied to this species is P. difformis, Lee. (loc. cit., VII, 223) ; the latter, however, differs by the narrower form and strongly striate elytra; it is found in Arizona.

The two species above mentioned serve to illustrate, in a small degree, the varied form of the Pelecyphori of North America. Lacordaire has separated them as a distinct genus, Philolithus, which does not appear to me capable of being retained. The only différence between it and Pelecyphorus, is that the external terminal angle of the anterior tibiae is distinct in the latter and slightly prolonged, while in the former it is rounded. Now I do not find an exact correspondence between our species in this respect. P. elatus, for instance, has the angle distinct but rounded, while in P. carinatus it is much less prominent. In P. Mrsutus, rimatus and some others, it is quite as acute as in Asida or Euschides. For this reason, I hâve not adopted the genus proposed by my learned friend, who states with a proper caution, that the gênera of this portion of the tribe Asidites are very indefinite and separated by very feeble characters. The only character of moment which I find to separate Asida I. 32

126 ARCANA NATURJÎ.

opaca, Say (considered by Lacordaire as a geniiine Asida) from the othor species, placed by me in Pelecijphonis, is the distinct fissure each side of the gula, permitting the base of the maxillse to be seen ; and it was for this reason that I placed Â. opaca in Eiischides, which differs only by the posterior angles of the thorax not being distinct; a character certainly not of generic value; and a slight différence in the form of the mentum.

AMPHIDORA, Esch.

14. A. oscuLANS, oblonga, atra nitida, pilis longis fiilvis dense vestita, thorace subtransverso, lateribiis Dcilde rotundatis , confertimpunctato, posticeangustato, angulis posticis minutis redis; elytris seriatimpunctatis, interstitiis sat dense rugosis etpunctatis. — Long. 15 mill. — ïab. XII, fig. 4.

Leconte, Annals ofthe Lyceim of Natural History of New York, V, 136. San Diego and Santa Isabel, Galifornia. Resembles in form A. littoralis, Esch., but is much larger. The anterior tarsi of the maie are not dilated as in that species (as they also are, but more feebly in A. nigro-pilosa, Lee), but the posterior tibiae, about one-fourth of their length from the apex, on the inner margin, are armed with a small acute tooth.

TANARTHRUS, Lee.

15. T. SALiNus, depressiis, riifo-testaceus, tenuiter cinereo-pubescens, subtiliter punchdatiis, capite thoraceque nitidis, illo magno basi emarginato, antennarum articula ultimo prœcedentes 4 œquante. — Long. 6 1/2 mill. — Tab. XIII, fig. 8.

Leconte, Annals of the Lyceum of Natural History of New York, V, 156 ; Proceedings of the Academy of Natural Sciences of Philadelphia, VI, 104. Colorado Désert, on the margin of a saltlake, flying over the half-dried mud like a Bembidium.

This genus belongs properly to the family Anthicidœ, Ihe eyes being entire. I regret that, by a misconception of my observation [Proc. Acad., VII, 277) regarding a supposed species of Xylophilus, X. (?) basalis, Lee, which has the eleventh joint ofthe antennœ elongated as in Tanarthrus, Lacordaire should hâve considered that I meant to apply the expression « but the eyes are deeply emarginate, as in the other species of Xylophilus » to Tanarthrus. It was intended to show that the species under considération X (?) basalis, although possessing the antennae of Tanarthrus did not belong to that genus, nor even to the same family, but was, in essential characters, a Xylophilus. The genus Tanarthrus, in fact, fînds ils place in the family Anthicidœ, and in Lacordaire's synoptic table [Gen. Col., Y, 591), would enter immediately after Anthicus, from which it differs by the last joint of the antennae being elongated and almost divided into two, and by the penultimate joint of the tarsi not being bilobed.

CYSTEODEMUS, Lee.

16. C. ARMATus, obscure œneo-oUvaceus, opacus, capite punctato, postice canaliculato, occipite conico ; thorace punctato, utrinque spina acuta armato; elytris antrorsum angustatis, dorso antice late depressis; spatiis impressis, irregularibus, reticulatis. — Long. 11-18 mill. — Tab. XIII, fig. 3.

Leconte, Annals ofthe Lyceum of Natural History ofNew York, V, 158; Proceedings of the Academy of Natural Sciences of Philadelphia. VI, 330. Colorado Désert, California, on Larrea mexicana, or creeping on the sand. The other species of this genus, C. Wislizeni, Lee, has the elytra globose, of a beautiful blue color, cancellate with large punctures and the thorax pentagonal ; it is found in Ari-

ARCANA NATURiE. 127

zona and New Mexico, and is figured by me in Smithsonian contributions, XI, in a memoir on tlie Goleoptera of Kansas and New Mexico.

I formerly included in this genus Meloe cancellatus, Br. and Er., and C. vittatus, Lee. [Proc. Acad., VI, 330), which diflPer by the elytra being much shorter than the abdomen and diverging, though not imbricate as in 3Moe. The ungues are armed with a tootii as in Cysteodemus. I now, however, fully agrée with the opinion ofLacordaire [GeM. Col., V, 660), that they should form a new genus, for which I propose the name Megetra.

MALLODON, Serv.

17. M. sERRULATus, pcco-nigeT nitidus, capite antice parchis, pone oculos densiuspunctato, genis subacutis; thorace transverso, lateribus scabro et inœquali, disco subtilius parce punctato, antrorsum subangustato, lateribus rectis sermlatis, versus angulos posticos paulo reflexis; elytris disperse subtilius punctatis. — Long. 70 mill. — Tab. XIII, fig. 5.

Leconte, Proceedings ofthe Academy of Natural Sciences of Philadelphia, VII, 82. Texas. This species resembles M. cilipes, Hald. (Prionus cilipes, Sayj, but the sides ofthe thorax are less serrate and less reflexed ; the dise is less convex ; the mandibles are similar to those of that species, not elongated, but thick and emarginate at the apex.

STENASPIS, Dup.

18. S. SPLENDENS, lugra, tîiorace latitudine breviore, suUnœquali, irregulariter modice punctato, plagis lœvibus relictis, postice magis constricto tuberculo laterali obtuso ; elytris viridi-œneis nitidis, rugis profundis parcis intricatis^ interstitiis elevatis convexis parce punctulatis ; femoribus lœte aurantiacisbasi apiceque nigris antennis nigris, extrorsum rufescentibus. — Long. 35 mill. — Tab. XII, fig. 9.

Leconte, Proceedings ofthe Academy of Natural Sciences of Philadelphia, VI, 441^ Texas. Resembles in color and form S. verticalis, i)up., but the thorax is entirely black, and the posterior constriction is much deeper; the very deep confluent rugosities of the elytra at first sight distinguish it.

19. S. solitaria, Lee. (Cerambyx solitarius, Say) varies in having the head, thorax and anterior part of the elytra reddish brown ; it dififers from both species above mentioned by the latéral tubercle of the thorax being more acute and the anterior tubercle more prominent^ as well as by its black color.

ARHOPALUS, Serv. (eraend., Lec.j.

20. A. EURYSTEïHus, fcrruglneus, subtus dense pallide sulphureo-pubescens, thorace fusco, dense sulphureo-pubescente, transverso, ad basin declivi, lateribus rotundatis ante basin angulatis ; elytris fuscis piceo-pubescentibus, fascia lata dentata ad quadrantem, linea angulata ad médium, fascia lata pone médium et linea angulata pallide sulphureis ornatis, ad apicem singulatim longe acuminatis ; pedibus late distantibus, prosterno postice subproducto, late subtruncato. — Long. 20 mill. — Tab. XIII, fig. 9.

Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, 1858, p. 82. Arizona. The latéral angle ofthe thorax is sometimes distinct, sometimes indistinct, never acutely prominent as in A. erijthropus. This species belongs to a group in which the anterior feet are widely sépara ted, the prosternum broadly and slightiy produced posteriorly, and the mesosternum snddenly declivous in front, thus exhibiting a tendency to Megaderus, which with the Trachyderides should immediately foUow this group in a natural arrangement.

i28 ARCANA NATURyE.

I hâve extended Arhopalus, Serv., to include ail those species usually classed with Clytus, but which differ from that genus by having the head not deflexed, the front short and oblique, not large and perpendicular as in Clytus, the legs moderate in length and the thighs never clavate nor spinous at the lip. In fact, they approach, in many characters Elaphidion, but differ by the eyes being finely granulate. The authors of the British Muséum catalogue hâve not adopted this view, which was expressed by me in the Journal of the Acaclemy of Natural Sciences of Philadelphia, 2nd ser., II, 16, and I now avail myself of the opportunity of placing it before the entomologists of Europe for adoption or condemnation.

MONILEMA, Syn.

21. M. ARMATUM, elongatum, nigrum, thorace lœvi, lateribus acute spinosis, apice et basi punctis submarginalibus notato; elytris subrugosis, parce grosse punctatis, apice lœvibus, dorso convexis, lateribus subito declivibus. — Long. 27 mill. — ïab. XIII, fig. 2.

Leconte, Proceedings of the Academy of Natural Sciences of Philadelphia, VI, 234. Texas. This species is similar in form to the Californian M. semipunctatum, Lee, but is more elongate; the thorax is smoolh on the dise, and the elytra are more punctured and rugous.

The genus Monilema is confined to the région between the Platte river of Kansas and the mountains of California, and replaces in America Dorcadion of the old world. The species are not numerous, and those known to me may be distinguished as follows :

A. Elytra coQvexa, rugose punctata :

1. Thorace lateribus vix armato, punctis basalibus perpaucis noiato; clylris striga postica subtiliter cinereo-

pubescente • M. annulatum, Say.

B. Elytra convexa, parce punctata.

a. Elytra omnino glabra.

2. Thorace spina laterali armato, parce grosse punctato , elytris antice et late-

ribus parce punctatis M. SEMIPUNCTATUM, Lee.

3. Thorace spina laterali armato, punctis basalibus pluribus; elytris parce

grosse punctatis M. armatum, Lee.

4. Thorace haud armato, opaco, punctis paucis dispersis; elytris fortiter grosse

punctatis, magis ovalibus M. crassum , Lee.

b. Elytra lineis reticulatis albo-pubescentibus.

5. Thorace spina laterali armato, série punctorum basali notato ; elytris parce

grosse punctatis M. albo-pictum, White.