332 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Pronotum two-thirds wider than long, slightly narrower at base 

 than apex, and widest along apical half; sides nearly parallel and 

 slightly sinuate from apical angles to basal third, then obliquely nar- 

 rowed to the posterior angles, which are rectangular; when viewed 

 from the side the marginal and submarginal carinae are feebly 

 sinuate, not very widely separated anteriorly, and connected to each 

 other behind the middle ; anterior margin nearly transversely truncate 

 and the median lobe only feebly indicated ; base transversely bisinuate, 

 the median lobe feebly, broadly rounded, and subtruncate in front 

 of scutellum; disk moderately convex, with a broad, shallow, trans- 

 verse depression behind the middle, with a large, deep depression 

 on each side along lateral margin at middle, and without prehumerai 

 carinae ; surface coarsely, transversely rugose, and with numerous fine 

 punctures between the rugae. Scutellum strongly, transversely cari- 

 nate, and the surface densely, finely reticulate. 



Elytra only feebly wider at base than pronotum ; sides nearly par- 

 allel to behind the middle, where they are arcuately expanded and dis- 

 tinctly wider than at base, then obliquely narrowed to the tips, which 

 are separately, rather broadly rounded and obsoletely serrulate ; sides 

 of abdomen not visible from above; disk feebly, longitudinally de- 

 pressed along the sutural margins, with broad, shallow basal depres- 

 sions, and a more or less distinct longitudinal costa on each elytron ; 

 surface coarsely but not closely imbricate-punctate and clothed with 

 a few short, very indistinct, hairs. 



Abdomen beneath finely, sparsely punctate, feebly alutaceous, and 

 very sparsely clothed with short, recumbent, whitish hairs ; first and 

 second segments convex at middle and without long pubescence; 

 vertical portions of the segments not conspicuously pubescent ; pygid- 

 ium not carinate. Prosternum sparsely, finely punctate, obsoletely 

 granulose, and sparsely clothed with long, erect, whitish hairs ; pro- 

 sternal lobe broad, strongly declivous, and broadly, arcuately emar- 

 ginate in front; prosternal process rather broad, the sides slightly 

 expanded behind the coxal cavities, then strongly narrowed to the 

 apex, which is acute. Posterior coxae with the posterior margin 

 slightly arcuately emarginate and the exterior angle feebly pro- 

 longed. Tibiae slender, straight, and the anterior and middle pairs 

 armed with a very small tooth on the inner margin at apex. Pos- 

 terior tarsi distinctly shorter than the tibiae, and the first joint as 

 long as the following two joints united. Tarsal claws similar on all 

 feet, cleft near the middle, the outer tooth long and acute, the inner 

 tooth broad, about one-half as long as the outer one, and not turned 

 inward. 



Length, 4 mm. ; width, 1.125 mm. 



Female. — Differs from the male in having the head uniformly 

 brownish cupreous, lateral margins more parallel, and the surface 



