268 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



anteriorly; anterior margin strongly sinuate, and the median lobe 

 strongly, broadly rounded ; base slightly emarginate at middle of each 

 elytron, the median lobe broadty rounded, and subtruncate in front 

 of scutellum; disk moderately convex, with two very vague median 

 depressions, a broad, moderately deep, oblique depression on each 

 side along lateral margin, and with rather distinct, straight pre* 

 humeral carinae; surface obsoletely granulose, coarsely, densely, 

 transversely rugose at middle, finely, sparsely punctate between the 

 rugae, and sparsely clothed with short, recumbent, yellowish- white 

 pubescence. Scutellum feebly, transversely carinate, and the surface 

 densely, finely reticulate. 



Elytra about as wide as pronotum at base, and slightly wider 

 at base than behind the middle; sides vaguely rounded for a short 

 distance behind base, broadly, vaguely constricted near middle, 

 feebly, arcuatety expanded behind middle, then obliquely narrowed 

 to the tips, which are separately, rather narrowly rounded, and 

 feebly serrulate; sides of abdomen broadly exposed above; disk 

 feebly flattened, with a vague depression along the sutural margins 

 which are slightly elevated posteriorly, and with broad, shallow basal 

 depressions; surface finely, densely imbricate-punctate, sparsely, 

 uniformly clothed with short, recumbent, whitish pubescence, and 

 each elytron ornamented with more or less distinct yellowish white 

 pubescent spots as follows; one in basal depression, one in front of 

 middle, and the other at apical third. 



Abdomen beneath finely, sparsely punctate, the punctures con- 

 nected transversely by fine, sinuate lines, which are coarser on basal 

 segment, sparsely clothed with moderately long, recumbent, white 

 pubescence, and with more densely pubescent spots at the sides of 

 the last three segments; first and second segments very vaguely, 

 longitudinally depressed at the middle, and clothed with longer 

 pubescence ; last segment broadly rounded at apex ; vertical portions 

 of first two segments more densely pubescent than ventral surface; 

 pygidium sparsely punctate, feebly carinate, but the carina not 

 projecting. Prosternum finely, sparsely punctate, and densely 

 clothed with long, erect, fine, whitish hairs; prosternal lobe broad, 

 strongly declivous, and broadly but feebly emarginate in front; 

 prosternal process broad, the sides slightly expanded behind the 

 coxal cavities, and truncate at apex. Tibiae slender, anterior pair 

 slightly arcuate, and the anterior and middle pairs armed with a 

 short tooth on inner margin at apex. Posterior tarsi distinctly 

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

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

 the inner tooth broader and shorter than outer one, and not turned 

 inward. Genitalia similar to impexus Horn. 



Length, 6 mm. ; width, 1.75 mm. 



