18 PROCEEDINGS OF THE NATIONAL, MUSEUM vol. 66 



broadly, but not very deeply arcuately emarginate in front; anten- 

 nae rather long, extending beyond middle of pronotiim and serrate 

 from the fourth joint. Pronotum about one and one-fourth times 

 as wide as long, distinctly wider in front than behind, and widest at 

 apical angles; sides obliquely narrowed from apical angles to the 

 base, where they are feebly expanded, Avhen viewed from the side the 

 lower margin is nearly straight, the upper one sinuate, strongly 

 arcuate anteriorly and connected to the lower margin at posterior 

 angle ; anterior margin deeply arcuately emarginate, with a broadly 

 rounded median lobe; base feebly sinuate on each side, with a 

 broadly rounded median lobe, which is truncate in front of scutel- 

 ium; disk moderately convex, with a rather broad, deep median de- 

 pression extending from anterior margin to base, and on each side 

 with a sinuate depression extending from the base along inner side 

 of lateral carina to anterior angle, the lateral carina sharply defined, 

 straight, and extending from base to near the middle, where it is 

 slightly arcuate ; surface coarsely and densely rugose, the rugae more 

 or less transverse on the disk, but becoming more obsolete and irre- 

 gular toward the sides, finely and rather densely punctate between 

 the rugae, and rather densely clothed with moderately long, yellow- 

 ish hairs in the depressed areas. Scutellum strongly transversely 

 carinate, and strongly accuminate at apex ; surface densely and finely 

 reticulate. Elytra distinctly wider than pronotum at base; sides 

 feebly, arcuately expanded for a short distance behind the humeral 

 angles, broadly arcuately constricted near middle, feebly expanded 

 at apical third, then obliquely attenuate to the tips, which are 

 strongly, coarsely dentate, the median tooth of each elytron being 

 the longest; sides of abdomen narrowly exposed above; disk feebly 

 convex, and each elytron with a broad, deep basal depression, and 

 with a more or less distinct longitudinal depression along the sutural 

 margin, which is feebly elevated posteriorly; surface finely, densely 

 imbricate-punctate, and besides the yellowish pubescent areas, is 

 sparsely clothed with very short inconspicuous hairs. Abdomen 

 beneath sparsely, finely punctate, the punctures becoming denser and 

 more or less connected toward the sides, very sparsely clothed with 

 short recumbent hairs, and with a more densely pubescent spot at 

 the sides of the segments; intervals nearly smooth; first segment 

 convex at middle, and without any median depression ; last segment 

 rather acutely rounded at apex; vertical portion of the segments 

 rather densely clothed with recumbent yellowish pubescence ; pygid- 

 ium without a median carina at apex. Prosternum sparsely, finely 

 punctate, densely, coarsely granulose, and sparsely clothed with 

 moderately long semi-erect cinereous hairs; prosternal lobe broadly 

 rounded in front, obsoletely emarginate at middle, and feebly de- 



