174 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 65 



beneath, feebly shining, and rarely with a metallic reflection ; beneath 

 sparsely pubescent. 



Head flat or feebly convex, with the sides obliquely narrowed to 

 the vertex; front and vertex without impressions or carinae; surface 

 densely and coarsely punctate, the punctures shallow, oblong, con- 

 fluent, irregular in shape, and with the bottoms coarsely, densely 

 granulose; eyes moderately large, feebly convex, and slightly closer 

 together on the vertex than at bottom; epistoma broadly arcuately 

 emarginate in front, forming an obtuse tooth on each side of the 

 emargination. Pronotum transverse, nearly one and one-half times 

 as wide as long, Avidest at apical third, slightly narrower behind than 

 in front; sides broadly rounded at apical third, then obliquely at- 

 tenuate to the posterior angles, which are rectangular, the marginal 

 line distinct posterior^; anterior margin deeply arcuately emargi- 

 nate, with a distinct angulated lobe at middle; base bisinuate, with 

 the median lobe large, broadly rounded, and strongly elevated near 

 the scutellum ; disk with a broad median longitudinal groove, feebly 

 impressed anteriorly, obsolete at middle, and terminating in a round 

 deep puncture in front of scutellum, sometimes with an obsolete de- 

 pression on each side of the median line; surface densely, coarsely 

 granulose at middle, with a few obsolete punctures intermixed, at 

 the sides the punctures are shallow, coarser, and confluent, the sides 

 forming a network of irregular polygonal areas, the bottoms of 

 which are densely granulose. Scutellum small, and the surface 

 coarsely and densely granulose. Elytra wider than pronotum at 

 base; sides obtusely angulate at base, broadly rounded at humeri, 

 nearly parallel to apical third, then strongly, acurately attenuate to 

 the tips, which are very acute; lateral margins finely serrate poste- 

 riorly; humeri not prominent; surface with a broad deep depression 

 between the base and humeri, and densely, coarsely scabrous. Ab- 

 domen beneath with posterior margin of segment smooth, and the 

 surface coarsely but not deeply punctate, the punctures coarser, and 

 open posteriorly on the basal segments, becoming merely transverse 

 crenulate lines toward the sides and apex; last segment broadly 

 arcuately emarginate at apex, the angles acute but not prominent, 

 and with an obsolete serrate subapical ridge. Metasternum more 

 densely punctured than abdomen, the punctures round, with the 

 sides well defined. Presternum strongly convex, the anterior margin 

 nearly truncate, and the surface coarsely and deeply punctate an- 

 teriorly, becoming transversely rugose posteriorly; prosternal proc- 

 ess feebly convex, sides narrowly margined, the surface very coarsely 

 punctate, abruptly expanded behind the coxal cavities and with an 

 acute tooth at apex. First joint of the posterior tarsi nearW as long 

 as the following three joints united. 

 Length, 7,5-11 mm.; width, 3-4.5 mm. 



