DESCRIPTIONS OF NEW SPECIES. 107 



E. longuius, but sculptured nearly in the same manner. The 

 punctures of the thorax are denser at the sides, which become 

 rugose; the striae of the elytra arc composed of punctures hut 

 little larger than those of the interspaces: the stria; are wry 

 feebly impressed towards the tip, and nut at all impressed in front. 



369. E. pinguis. Apterus, ovalis convexus, piceus BubnitidUB, capite 

 tlioraceque confertini fortiter punctatis, hoc longitudine plus duplo 

 latiore, autrorsum fortiter angustato, lateribus rotundatis, basi vix bi- 

 sinuata, angulis anticis acutis, posticis obtusis Bubrotundatis ; t-lvtris 

 confuse punctatis ; corpore subtus, auteunis pedibusque dilutioribus. 

 Long. -30. 



Cape San Lucas, Lower California; Mr. J. Xantus. Much 

 more robust than the other species, and resembling in form a 

 small Coniontis. The punctures of the thorax do not become 

 confluent at the sides, and the sides are considerably rounded ; 

 the greatest breadth is a little in front of the base, which is 

 scarcely perceptibly bisinuate ; the punctures of the elytra are 

 confused, presenting no traces of striae. 



370. E. convexus. Apterus, elongato-ovalis convexus, niger Bub- 

 nitidus, capite thoraceque coufertim punctatis, hoc versus latera rugoso, 

 latitudine fere duplo breviore, antrorsuin angustato, lateribus rotuinl.it is, 

 angulis anticis acutis, basi late rotundata, angulis posticis obtusis apioe 

 rotundatis ; elytris parce punctatis, punctis hie iude subseriatis, antennis 

 pedibusque rufo-piceis. Long. *20 — "26. 



New Mexico and Nebraska. The thorax is tolerably densely 

 punctured, the punctures becoming confluent at the sides. The 

 elytra are almosfc equably punctured, though slight vestiges of 

 series of punctures forming strise may be traced. The posterior 

 angles of the thorax are rounded at tip, and somewhat obtuse, 

 though the base is but slightly narrower than the greatest breadth. 



371. E. obtusus. Apterus, elongato-ovalis couvexus, niger sub- 

 opacus, capite thoraceque confertim subtilius punctatis, hoc latitudine 

 fere duplo breviore, ante medium angustato, postice paulo angustato, 

 lateribus magis rotundatis, angulis anticis acutis, ad basin vix rotun- 

 dato, angulis posticis obtusis baud rotundatis; elytris striis punctatis 

 haud impressis, interstitiis parce subtilius punctatis; pedibns obMUTC 

 ferrngineis. Long. *30. 



Two specimens, found by me at Benicia, California. Sufficiently 

 distinct by the characters given above. It is larger than E. ater, 

 and readily known by the thorax being slightly narrowed from 



