16 PROCEEDINGS OF THE NATIONAL MUSEUM vol.82 



strongly triangular and about as wide as long; eyes rather small, 

 oblong, slightly more acutely rounded beneath than above. 



Pronotum subequal in length and width, wider at apex than at 

 base, widest near middle ; sides feebly, arcuately rounded anteriorly, 

 obliquely narrowed posteriorly to the posterior angles, which are 

 rectangular; when viewed from the side the marginal and submar- 

 ginal carinae nearly straight, rather widely separated anteriorly, and 

 connected to each other at the base ; anterior margin strongly sinuate, 

 the median lobe strongly produced and broadly rounded; base 

 feebly, arcuately emarginate at middle of each elytron, with the 

 median lobe moderately produced, and broadly rounded; disk 

 strongly convex, feebly, transversely depressed on basal half, the 

 depression extending on each side along lateral margin, but becoming 

 narrower toward apical angle, with a vague, broad, median depres- 

 sion extending from base to near anterior margin, and with vague, 

 short, straight prehumeral carinae ; surface finely, densely granulose, 

 coarsely but not deeply rugose, the rugae widely separated, transverse 

 on disk, and longitudinal at sides, finely, sparsely punctate between 

 the rugae, and sparsely clothed with short, inconspicuous hairs. 

 Scutellum transversely carinate, the surface finely, densely reticulate. 



Elytra slightly wider than pronotum at base, slightly narrower 

 at base than behind middle; sides slightly expanded behind base, 

 broadly, arcuately constricted at middle, broadly, arcuately ex- 

 panded behind middle, then obliquely narrowed to the tips, which are 

 separately narrowly rounded and feebly serrulate ; sides of abdomen 

 vaguely exposed above ; disk slightly flattened along sutural margins, 

 which are strongly elevated posteriorly, and with broad, deep, basal 

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

 uniformly clothed with short, recumbent, white hairs. 



Abdomen beneath feebly, sparsely marked with transverse, crenu- 

 late lines, which are coarser at sides of basal segment, finely, sparsely 

 punctate, and sparsely clothed with short, recumbent, white hairs; 

 first segment strongly convex at middle, the suture between first and 

 second segments not indicated at the sides; last segment broadly 

 rounded at apex ; vertical portions of the segments not conspicuously 

 pubescent; pygidium finely granulose, feebly, coarsely punctate, and 

 not distinctly carinate at the middle. Prosternum densely, coarsely 

 granulose, sparsely punctate, and sparsely clothed with short, recum- 

 bent, white hairs; prosternal lobe broad, strongly declivous, deeply 

 emarginate in front, forming an arcuate lobe on each side ; prosternal 

 process rather wide, the sides parallel to behind the coxal cavities, 

 then obliquely narrowed to the apex, which is acute. Tibiae slender 

 and unarmed at apices. Posterior tarsi slightly more than half as 

 long as tibiae, the first joint as long as the following two joints 

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



