38 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Pronotum one-fourth wider than long, wider at base than apex, 

 and widest at the base ; sides slightly rounded behind apical angles, 

 then nearly parallel to posterior angles, which are slightly expanded ; 

 when viewed from the side the marginal carina is feebly sinuate, 

 the submarginal carina straight, the two carinae rather widely sepa- 

 rated anteriorly, and connected to each other near the base ; anterior 

 margin feebly sinuate, with the median lobe obsoletely rounded ; base 

 transversely truncate to middle of each elytron, then broadly rounded 

 to the scutellum, in front of which it is broadly subtruncate; disk 

 strongly convex, with a broad, deep, concave, median depression ex- 

 tending from base to near the anterior margin, the depression much 

 deeper posteriorly, a broad, deep depression on each side along lateral 

 margin, and without distinct prehumeral carinae; surface coarsely, 

 densely, and irregularly rugose, coarsely, densely punctate between 

 the rugae, and sparsely clothed in the depressions with long, recum- 

 bent, yellowish pubescence. Scutellum depressed, not transversely 

 carinate, and the surface somewhat rugose. 



Elytra slightly narrower than pronotum at base, slightty wider at 

 base than at apical third, rather deeply, broadly, arcuately con- 

 stricted in front of middle, and obliquely attenuate from apical third 

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

 serrulate; sides of abdomen very broadly exposed above; disk 

 slightly flattened, feebly, broadly concave along the sutural mar- 

 gins, and with broad, shallow basal depressions; surface finely, 

 densely granulate-punctate, more or less rugose, and sparsely clothed 

 with short, recumbent, whitish pubescence. 



Abdomen beneath finely punctate at middle, more coarsely and 

 densely at the sides and on first segment, the punctures connected 

 transversely by sinuate lines, rather densely clothed with recumbent 

 yellowish white pubescence, and the lateral margin entirely obliter- 

 ated on the first two segments; first segment convex, not depressed 

 or densely pubescent at middle; vertical portions of the segments 

 not conspicuously pubescent; pygidium coarsely punctate, with a 

 median carina, which is not projecting. Prosternum coarsely, 

 densely rugose, and rather densely clothed with long, erect, white 

 hairs at the middle; prosternal lobe wide, strongly declivous, and 

 broadly subtruncate in front; prosternal process broad, the sides 

 parallel to behind the coxal cavities, and obtusely rounded at apex. 

 Posterior coxae with the posterior margin broadly, arcuately emar- 

 ginate, and the exterior angle rectangular. Tibiae slender, the an- 

 terior and middle pairs feebly arcuate, and not distinctly armed 

 with a tooth at apex. Posterior tarsi distinctly shorter than the 

 tibiae, and the first joint as long as the following two joints united. 



