280 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



Pronotum scarcely one-fourth wider than long, narrower at base 

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

 feebly narrowed from apical angles to behind the middle, then 

 strongly narrowed to the posterior angles, which are rectangular; 

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

 the submarginal carina nearly straight, the two carinae rather nar- 

 rowly separated at apical third, and connected to each other at apex 

 and behind the middle; anterior margin strongly sinuate, and the 

 median lobe strongly, broadly rounded; base rather strongly emargi- 

 nate at middle of each elytron, the median lobe feebly, broadly 

 rounded, and slightly emarginate in front of scutellum; disk mod- 

 erately convex, with a broad, longitudinal median depression, some- 

 times feebly divided at middle, a broad, shallow depression on each 

 side along lateral margin, and with sharply defined, straight, pre- 

 humeral carinae, extending from base to basal third; surface finely. 

 densely granulose, subopaque, and finely, transversely rugose at 

 middle, finely, sparsely punctate between the rugae, and sparsely 

 clothed with white hairs at the sides. Scutellum strongly, trans- 

 versely carinate, and the surface finely, densely reticulate. 



Elytra slightly wider than pronotum at base, and slightly wider 

 at base than behind the middle ; sides slightly rounded for a short 

 distance behind base, broadly, arcuately constricted in front of 

 middle, feebly expanded behind the middle, then strongly narrowed 

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

 strongly serrulate ; sides of abdomen narrowly exposed above : disk 

 slightly, longitudinally concave along the sutural margins, which 

 are elevated posteriorly, a vague costa on each side, and with broad, 

 moderately deep basal depressions; surface densely, finely imbri- 

 cate-punctate, sparsely clothed with short, white hair posteriorly, 

 and each elytron ornamented with white pubescent spots as follows : 

 a round spot in basal depression, an elongate spot in front of middle, 

 and a smaller spot at apical third. 



Abdomen beneath finely, sparsely punctate, the punctures becoming 

 coarser and transversely rugose on basal segments, and sparsely, uni- 

 formly clothed with short, recumbent, white pubescence; first and 

 second segments broadly, feebly, longitudinally concave at middle, 

 and the concavity sparsely clothed with long, erect, white hairs; last 

 segment broadly rounded or subtruncate at apex; vertical portions 

 of the segments not conspicuously pubescent ; pygidium sparsely punc- 

 tate but not distinctly carinate. Prosternum rather coarsely rugose, 

 and sparsely clothed with moderately long, erect, white hairs; pros- 

 ternal lobe broad, feebly declivous, and arcuately rounded in front ; 

 prosternal process broad, the sides strongly expanded behind the 

 coxal cavities, then abruptly narrowed to the apex, which is acute. 



