314 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



and arcuately emarginate in front of scutellum; disk moderately 

 convex, with a vague, elongate, median depression, a shallow, oblique 

 depression on each side along lateral margin, and with distinct but 

 not strongly elevated, arcuate prehumeral cariuae ; surface densely, 

 coarsely rugose, the rugae transverse at middle, but becoming more 

 or less longitudinal toward the sides, rather densely, finely punctate 

 between the rugae, but without distinct pubescence. Scutellum 

 strongly, transversely carinate, and the surface finely, densely 

 reticulate. 



Elytra 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 middle, 

 broadly, arcuately expanded behind middle, then obliquely narrowed 

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

 serrulate, sides of abdomen narrowly exposed above; disk feebly, 

 longitudinally flattened along sutural margins, which are slightly ele- 

 vated on apical half, and with broad, shallow basal depressions ; sur- 

 face densely, coarsely imbricate-punctate, and clothed with a few 

 verv short, inconspicuous hairs in basal depressions and on apical 

 half. 



Abdomen beneath obsoletely granulose, sparsely, finely punctate, 

 the punctures more or less connected transversely by sinuate lines, 

 becoming feebly rugose on basal segment, and very sparsely clothed 

 with short, inconspicuous hairs; first segment convex at middle; 

 last segment broadly rounded at apex; vertical portions of seg- 

 ments not conspicuously pubescent; pygidium sparsely, coarsely 

 punctate, and the median line smooth, but not carinate. Prester- 

 num finely, sparsely punctate, and sparsely clothed with short, re- 

 cumbent hairs; prosternal lobe broad, feebly declivous, and broadly 

 rounded in front; prosternal process broad, the sides rather strongly 

 expanded behind the coxal cavities, and truncate at apex. Pos- 

 terior coxae with the posterior margin slightly, arcuately emargi- 

 ate, and the exterior angle feebly prolonged. Tibiae slender and 

 without a distinct tooth on inner margin at apex. Posterior tarsi 

 slightly shorter than the tibiae, and the first joint nearly as long as 

 the following three joints united. Tarsal claws similar on all feet, 

 cleft near the middle, the inner tooth broad, much shorter than 

 outer one, and not turned inward. 



Length, 4.75 mm. ; width, 1.25 mm. 



Male. — Differs from the female in having the front of head sub- 

 opaque, bronzy green, becoming brownish on the occiput, feebly 

 convex, lateral margins feebly, arcuately expanded above the middle, 

 and the surface densely, finely granulose, coarsely punctate in front, 

 becoming feebly longitudinally rugose on occiput, and sparsely 



