54 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



circular emargination in front; antennae extending to middle of 

 pronotum, serrate from the fourth joint, and the outer joints slightly 

 wider than long; eyes rather large, elongate, and slightly more 

 acutely rounded beneath than above. 



Pronotum one-half wider than long, slightly narrower at base 

 than apex, and widest near middle; sides feebly, arcuately rounded 

 from apical angles to behind middle, then abruptly narrowed to 

 the posterior angles, which are rectangular; when viewed from the 

 side the marginal and submarginal carinae are feebly sinuate, widely 

 separated anteriorly, and connected to each other behind the middle ; 

 anterior margin feebly sinuate, and without a distinct median lobe; 

 base strongly emarginate at middle of each elytron, the median lobe 

 broadly rounded, and subtruncate in front of scutellum; disk mod- 

 erately convex, with a vague, broad median depression near anterior 

 margin, broadly, transversely depressed on basal half, a broad, deep 

 depression on each side along lateral margin, and with sharply defined, 

 short, arcuate prehumeral carinae; surface obsoletely granulose, 

 coarsely but not closely, transversely rugose, and sparsely, finely 

 punctate between the rugae. Scutellum feebly, transversely carinate. 

 and the surface finely, densely reticulate. 



Elytra slightly wider than pronotum at base, and about equal in 

 width at base and behind middle; sides nearly parallel for a short 

 distance behind base, broadly, arcuately constricted in front of mid- 

 dle, broadly expanded behind the middle, then obliquely narrowed 

 to the tips, which are separately, broadly rounded, and feebly ser- 

 rulate; sides of abdomen rather broadly exposed above; disk feebly 

 convex, sutural margins feebly elevated posteriorly, and with broad, 

 deep, basal depressions; surface densely, coarsely imbricate-punctate, 

 and sparsely clothed with short, inconspicuous hairs. 



Abdomen beneath obsoletely reticulate, finely, sparsely punctate, 

 the punctures more or less connected transversely by sinuate lines, 

 which are coarser on the basal segment, and sparsely clothed with 

 moderately long, recumbent, whitish hairs; first segment strongly 

 convex, and without a median depression; last segment broadly 

 rounded at apex; vertical portions of segments not conspicuously 

 pubescent; pygidium coarsely, sparsely punctate, but not distinctly 

 carinate. Prosternum finely, sparsely punctate, and sparsely clothed 

 with long, semierect, whitish hairs; prosternal lobe broad, strongly 

 declivous, and broadly but not deeply, arcuately emarginate in 

 front; prosternal process broad, the sides nearly parallel to behind 

 the coxal cavities, then obliquely narrowed to the apex, which is 

 acute. Tibiae slender, straight, and unarmed at apex. Posterior 

 coxae with the posterior margin broadly, arcuately emarginate, and 

 the exterior angle nearly rectangular. Posterior tarsi distinctly 



