312 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



broadly rounded, but not strongly produced; base transversely 

 bisinuate, the median lobe vaguely produced, and subtruncate in 

 front of scutellum ; disk moderately convex, without a median depres- 

 sion, but vaguely transversely concave on basal half, with a broad, 

 deep depression on each side along the lateral margin, and with 

 sharply elevated, short prehumeral carinae ; surface obsoletely granu- 

 lose, coarsely, deeply rugose, somewhat scabrous at middle, finely, 

 sparsely punctate between the rugae, and without distinct pubescence. 

 Scutellum strongly, transversely carinate, and the surface finely, 

 densety reticulate. 



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

 width at base and at apical third ; sides slightly expanded for a short 

 distance behind base, broadly, arcuately ponstricted in front of 

 middle, broadly expanded behind the middle, then obliquely narrowed 

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

 strongly serrulate; sides of abdomen narrowly exposed above; disk 

 slightly flattened, vaguely depressed along the sutural margins, 

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

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

 uniformly clothed with short, inconspicuous, white hairs. 



Abdomen beneath obsoletely granulose, finely, sparsely punctate, 

 more or less rugose on basal segment, and sparsely clothed with 

 moderately long, recumbent hairs; first and anterior part of second 

 segment rather deeply, broadly, longitudinally concave, and clothed 

 with long, semierect white hairs at the middle; vertical portions of 

 the segments not conspicuously pubescent ; pygidium without a 

 projecting carina. Presternum finely, densely punctate, finely rugose, 

 and rather densely clothed with long, erect, white hairs; prosternal 

 lobe broad, moderately declivous, broadly rounded in front, and with 

 a broad, shallow, arcuate emargination at the middle; prosternal 

 process broad, the sides vaguely expanded behind the coxal cavities, 

 then obliquely narrowed to the apex, which is acute. Posterior coxae 

 with the posterior margin feebly sinuate and arcuately emarginate, 

 and the exterior angle obtuse, and vaguely prolonged. Tibiae slender, 

 straight, and the anterior and middle pairs armed with an indistinct 

 tooth on inner margin at apex. Posterior tarsi subequal in length to 

 the tibiae, and the first joint as long as the following three joints 

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

 inner tooth broad, slightly shorter than outer one, and not turned 

 inward. 



Length, 5.25 mm. ; width, 1.25 mm. 



Female. — Differs from the male in being slightly more robust; 

 front of head slightly broader and less pubescent; first abdominal 



