62 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



submarginal carina nearly straight, the two carinae rather widely 

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

 anterior margin slightly sinuate, with the median lobe broadly, 

 vaguely rounded ; base transversely bisinuate, the median lobe feebly 

 produced, and arcuately emarginate in front of scutellum; disk 

 moderately convex, with two round, shallow depressions arranged 

 longitudinally at the middle, a rather broad, oblique depression along 

 lateral margin extending from apical fourth to base, and with sharply 

 defined, straight prehumeral carinae, extending from base to near 

 middle; surface finely, densely granulose, finely but not deeply, 

 transversely rugose, with numerous fine punctures between the rugae, 

 and sparsely clothed toward the sides with recumbent, whitish pu- 

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

 face densely, 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, broadly, arcuately expanded behind the middle, then obliquely 

 narrowed to the tips, which are separately, broadly rounded, and 

 finely serrulate; sides of abdomen scarcely visible from above; 

 disk slightly flattened, sutural margins strongly elevated from 

 basal third to apex, and with broad but not very deep, basal depres- 

 sions; surface finely, densely granulose, irregularly imbricate-punc- 

 tate, and each elytron ornamented with a broad, indistinct vitta of 

 sparsely placed white hairs, extending from basal depression to apex, 

 and the apical third more or less clothed with inconspicuous white 

 hairs. 



Abdomen beneath finely granulose, sparsely, finely punctate pos- 

 teriorly, becoming more densely, coarsely punctate and transversely 

 rugose on the basal segment, and sparsely, clothed with short, recum- 

 bent, whitish pubescence; first and second segments broadly, vaguely 

 flattened at middle; vertical portions of the segments not conspicu- 

 ously pubescent ; pygidium sparsely, coarsely punctate, but not longi- 

 tudinally carinate at middle. Prosternum finely, densely punctate, 

 and rather densely clothed along middle with long, fine, erect hairs ; 

 prosternal lobe broad, moderately declivous, and broadly, feebly, 

 arcuately emarginate in front; prosternal process rather wide, and 

 gradually narrowed to the apex, which is acute. Posterior coxae with 

 the posterior margin broadly, arcuately emarginate, and the exterior 

 angle rectangular. Tibiae slender; anterior and middle pairs armed 

 with a short tooth on inner margin at apex; posterior pair unarmed 

 at apex. Posterior tarsi shorter than tibiae. Anterior and middle 

 tarsal claws cleft near the middle, the outer teeth acute at apex, the 



