390 PROCEEDINGS OF THE ACADEMY OF 



extends from the humerus backwards, about one-third the length of the ely- 

 tron, growing broader posteriorly, and inclining towards the suture ; the pos- 

 terior spot is transverse, reaching neither the suture nor the side, and is placed 

 about the posterior third of the length. 



In form this species is similar to C. c h o r i s, from which it differs altogether 

 by its sculpture. 



MEGAPENTHES Kies. 



M. angularis, fusco rufescens nitidus, dense helvo-pnbescens, tho- 

 race latitudine paulo longiore, lateribus postice parallelis, antice rotundatis, 

 disco convexo sat dense punctato, punctis umbilicatis, postice vix canalicu- 

 lar, angulis posticis fortiter bicarinatis ; elytris striis punctatis, interstitiis 

 baud couvexis, rugose punctatis, antennis pedibusque paulo pallidioribus, 

 illis articulis 2 et 3 conjunctis 4to haud brevioribus. Long. 10 mm. 



One specimen ; Missouri. This specimen agrees with the description of M. 

 modestus Cand., Mon. EL, ii. 507, from northern Hindoostan, except that 

 the thorax is scarcely channeled near the base, and that the antennae can 

 hardly be said to be ferruginous, nor the feet red. 



ANCHASTUS Lee. 



A. bi color, ferruginous, subtilius pubescens, capite thoraceque sat 

 dense punctatis, hoc latitudine fere longiore, angulis posticis vix divergenti- 

 bus, unicarinatis, lateribus rectis prope apicem rotundatis, disco convexo 

 postice canaliculato ; elytris nigerrimis, striis punctatis, interstitiis planis 

 punctulatis ; antennis obscuris, articulis 3io et 4to aequalibus. Long. 7 mm. 



One specimen from Cape San Lucas, Lower California, in the collection of 

 Mr. Ulke. The membranous lobe of the third tarsal joint extends slightly 

 beyond the fourth joint. 



MELANOTUS Esch. 



M. gradatus, nigro-piceus, pube brevi subtili vestitus, thorace convexo, 

 latitudine haud breviore, lateribus subparallelis, antice rotundatis, basi dense 

 subtiliter, apice rude punctato, angulis posticis unicarinatis ; elytris striis 

 punctatis, interstitiis planis punctulatis, pedibus piceo-ferrugineis ; antenna- 

 rum articulo 3io sequente paulo breviore. Long. 13*5 mm. 



One specimen from Maryland, in the collection of Mr. Ulke. Very distinct 

 by the punctuation of the thorax, which is coarse near the anterior margin, 

 gradually becoming fine and very dense at the base. The head is coarsely 

 punctured, the front somewhat flattened and vaguely impressed ; the thorax 

 is feebly channeled behind the middle. The third joint of the antennae is 

 about twice as long as the second, and but little shorter than the fourth. 



M. opacicollis, fuscus, capite dense punctato, thorace latitudine haud 

 breviore, antice angustato, lateribus late rotundatis, confertissime punctulato, 

 opaco, pube erecta grisea dense vestito, versus apicem punctato, angulis pos- 

 ticis bicarinatis ; elytris nitidis, striis punctatis, interstitiis parce punctulatis, 

 cinereo-pubescentibus ; antennis pedibusque ferrugiueis, illis articulo 3io 

 prsecedente sesqui longiore. Long. 10 11 mm. 



Rock Island, Illinois ; Mr. B. D. Walsh. The disc of the thorax is mode- 

 rately convex, very feebly channeled, covered (except near the apical margin 

 which is moderately punctured) with a very fine punctuation, so dense as to 

 make the surface dull ; the pubescence is short and erect. The front is 

 slightly depressed ; the third joint of the antennae is not dilated, and is one- 

 half longer than the second. This species is very distinct by the sculpture of 

 the thorax. 



The female differs by the thorax being more convex and less narrowed in 

 front. The antennae are alike in both sexes. 



[Dec. 



