242 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



rugose, sparsely punctate between the rugae, and sparsely clothed 

 with very short, recumbent, white hairs ; epistoma not transverse be- 

 tween the antennae, and broadly, arcuately emarginate in front; 

 antennae extending to middle of pronotum, serrate from the fifth 

 joint, and the outer joints slightly wider than long; eyes rather large, 

 broadly oblong, and slightly more acutely rounded beneath than 

 above. 



Pronotum about one-fourth wider than long, nearly equal in 

 width at base and apex, and widest at middle; sides regularly, arcu- 

 ately rounded from apical angles to near posterior angles, which are 

 rectangular; when viewed from the side the marginal and submar- 

 ginal carinae are more or less sinuate, and narrowly separated for 

 their entire length ; anterior margin strongly sinuate, and the median 

 lobe strongly produced; base feebly emarginate at middle of each 

 elytron, the median lobe broadly rounded, and vaguely emarginate in 

 front of scutellum; disk moderately convex, with a vague, longitu- 

 dinal median depression, a rather deep depression on each side along 

 lateral margin, and with vaguely indicated prehumeral carinae ; sur- 

 face finely, transversely rugose, the rugae somewhat concentrical on 

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

 clothed with white hairs in the lateral depressions. Scutellum dis- 

 tinctly, transversely carinate, and the surface finely, densely 

 reticulate. 



Elytra slightly wider than pronotum at base, and equal in width 

 at base and behind the middle; sides nearly parallel for a short dis- 

 tance behind base, feebly, broadly constricted in front of middle, 

 broadly, arcuately expanded behind the middle, then obliquely nar- 

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

 finely serrulate ; sides of abdomen broadly exposed above ; disk feebly 

 flattened, narrowly depressed along the suturai margins, which are 

 strongly elevated posteriorly, and with broad, shallow basal depres- 

 sions; surface coarsely, densely imbricate-punctate, sparsely, uni- 

 formly clothed with short indistinct hairs, and each elytron orna- 

 mented with a narrow vitta of sparsely placed white hairs, extending 

 from the basal depression to apex. 



Abdomen beneath obsoletely granulose, finely, sparsely punctate, 

 the punctures connected transversely by sinuate lines, which are 

 coarser on basal segment, and sparsely, uniformly clothed with 

 short, recumbent, white hairs; first segment convex at middle; 

 vertical portions of the segments sparsely clothed with moderately 

 long, white hairs; pygidium finely, sparsely punctate, and not 

 longitudinally carinate. Presternum finely, sparsely punctate, and 

 sparsely clothed with short, white hairs; prosternal lobe broad, 

 strongly declivous, and broadly subtruncate in front : prosternal 



