20 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 66 



epistoma rather wide between the antennae, and broadly feebly ar- 

 cuately emarginate in front; antennae rather long, extending to 

 middle of the pronotum, and serrate from the fourth joint. Prono- 

 tum only slightly wider than long, distinctly wider in front than 

 behind, and widest at apical angles; sides obliquely narrowed from 

 the apical angles to the base, and when viewed from the side the t^vo 

 margins are strongly sinuate, separated anteriorly, and connected 

 to each other at the basal fourth; anterior margin deeply arcuately 

 emarginate, with a broadly rounded median lobe; base rather 

 strongly emarginate at middle of each elytron, with a broadly 

 rounded median lobe, which is feebly arcuately emarginate in front 

 of scutellum; disk moderately convex, with two round shallow me- 

 dian depressions, and rather deeply depressed on each side along 

 lateral margin, the lateral carina not very sharply defined, nearly 

 straight, and extending from the posterior angle to basal fourth; 

 surface finely and densely rugose, the rugae more or less con- 

 centrical on the disk, the intervals densely granulose, with numerous 

 fine punctures along the rugae, and clothed with a fcAv short cinere- 

 ous hairs on the depressed areas along sides. Scutellum strongly 

 transversely carinate, and strongly acuminate at apex; surface 

 finely and densely reticulate. Elytra slightly wider than pronotum 

 at base ; sides parallel for a short distance behind base, broadly and 

 strongly arcuately constricted at middle, feebly arcuately expanded 

 at apical third, then obliquely attenuate to the tips, which are sub- 

 truncate, strongly dentate, with the median tooth of each elytron 

 much longer than the others; disk feebly convex, and each elytron 

 with a very broad, moderately deep basal depression, and an obsolete 

 longitudinal depression along the sutural margin, the depression 

 more deeply impressed from basal fourth to middle, and the suture 

 feebly elevated posteriorly; sides of abdomen broadly exposed 

 above; surface coarsely and densely imbricate-punctate, and be- 

 sides the cinereous pubescent areas, is sparsely clothed with short 

 inconspicuous hairs. Abdomen beneath sparsely, finely punctate, 

 the punctures becoming denser and feebly striolate toward the 

 sides, very sparsely clothed with short recumbent cinereous hairs, 

 and with a slightly denser pubescent spot at the sides of the seg- 

 ments; intervals obsoletely reticulate; first segment convex at mid- 

 dle, without any median depression; last segment acutely rounded 

 at apex; vertical portion of first segment with a densely pubescent 

 spot; pygidium without a median carina at apex. Prosternum 

 sparsely finely scabrous, more or less rugose, and very sparsely 

 clothed with short recumbent cinereous hairs ; prosternal lobe broadly 

 rounded in front, obsoletely emarginate at middle, and moderately 

 declivous; prosternal process rather broad, the sides nearly parallel 



