146 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



anteriorly, and connected to each other near the base; anterior mar- 

 gin strongly sinuate ; with a broadly rounded median lobe ; base 

 feebly emarginate at middle of each elytron, the median lobe broadly 

 rounded, and truncate in front of scutellum; disk moderately con- 

 vex, with a broad, vague, median depression composed of an anterior 

 and posterior part, a broad, moderately deep depression on each side 

 along lateral margins, and with sharply defined, arcuate prehumeral 

 carinae extending from posterior angles to near middle; surface 

 densely but not deeply transversely rugose, finely, densely granulose, 

 finely punctate between the rugae, and sparsely clothed with very 

 short, recumbent, whitish hairs, with a few longer ones in the lateral 

 depressions. Scutellum strongly, transversely carinate, and the sur- 

 face finely 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, arcuately expanded behind middle, then obliquely attenuate to 

 the tips, which are separately, rather acutely rounded and strongly 

 serrulate; sides of abdomen narrowly exposed above; disk feebly 

 flattened at middle, forming a vague costa toward the sides, sutural 

 margins strongly elevated posteriorly, and with broad, deep basal 

 depressions; surface finely imbricate-punctate, and ornamented with 

 three indistinct, cinereous pubescent spots arranged as follows : One 

 basal, one in front of middle merely represented by a slightly denser 

 punctured area, and a more elongate one at apical third, extending 

 along margin to near apex. 



Abdomen beneath finely, sparsely punctate at middle, more densely 

 toward the sides, becoming transversely rugose on the basal segment, 

 and densely clothed toward the sides with long, recumbent, whitish 

 hairs and efflorescence, with a few shorter hairs of the same color 

 on the median parts; first and second segments convex, and without 

 a median groove; last segment broadly rounded at apex; vertical 

 portions of segments rather densely but not conspicuously, clothed 

 with short, whitish pubescence; pygidium strongly carinate, the 

 carinae projecting, and truncate at apex. Prosternum densely, 

 coarsely punctate, and rather densely clothed with long, recumbent, 

 whitish hairs ; prosternal lobe broad, strongly declivous, and broadly, 

 arcuately rounded in front ; prosternal process broad, the sides nearly 

 parallel to behind the eoxal cavities, then strongly narrowed to the 

 apex, which is acute. Tibiae slender, straight, and the anterior pair 

 with an indistinct tooth on inner margin at apex. Posterior tarsi 

 shorter than tibiae, and the first joint about as long as the following 

 two joints united. Tarsal claws similar on all feet, cleft near the 

 middle, and the inner tooth shorter than the outer one. 



Length, 9.5 mm. ; width, 2.5 mm. 



