390 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 88 



Pronotum 1.6 times as wide as long, widest near base, which is 

 broadly procurved medially; sides strongly arcuate on posterior 

 two-thirds, then constricted and distinctly transversely impressed 

 just behind the very broadly rounded front margin, which is sinuate 

 (broadly and shallowly emarginate) in middle; surface shining, 

 reddish brown, finely and closely granulate-punctate; at each side 

 with two small groups of rather small asperities, about one-fourth 

 and one-half of the distance from anterior margin, each group 

 usually with three or four asperities, united in transverse line; with 

 a few very low, weak asperities anteriorly in transverse impression; 

 surface partly masked by numerous small, recumbent scales, those at 

 sides and on posterior third consisting of many nearly white, cine- 

 reous ones with a few cinnamon-brown ones intermixed, those 

 on rest of disk mostly cinnamon-brown; anterior margin with a 

 sparse border of moderately long, coarse, brown, erect setae, shorter 

 in middle. 



Elytra 1.3 times as long as wide, slightly wider than pronotum; 

 sides straight and subparallel on anterior two-thirds, broadly 

 rounded behind; basal margins strongly elevated in median area, 

 gradually becoming lower to fifth interspace on each elytron, with 

 about 6 crenulations in a continuous line at each side ; striae narrow, 

 distinctly impressed, the first two deej^er, punctures moderately 

 small and close; interspaces convex, finely rugose-punctate, with a 

 sparse median row of slightly larger punctures and a few feeble 

 granules; surface rather sparsely clothed with small, recumbent 

 scales, some of them a cinnamon-brown and some very light cinereous, 

 the latter less numerous, intermixed with the darker scales in no 

 definite pattern except for a narrow stripe in the sutural interspaces ; 

 each interspace with a median row of stout, erect, brown setae; each 

 elytron with a dense group of brown setae just behind the basal 

 margin. Declivity moderately steep, broadly, shallowly impressed 

 in the sutural region, with a few fine low granules in the second and 

 third interspaces, visible only in denuded specimens. 



Ventral surface reddish brown, shining, sparsely clothed with nearly 

 white, recumbent, usually bifurcate scales except on the last three ab- 

 dominal segments, those on last three segments mostly brown, mostly 

 entire, erect. Foretibia (fig. 18, /) Math 10 teeth on outer margin. 



Male. — Similar in size and habitus to female; antennal club more 

 slender; frons similar to female except that the lateral hairs are 

 longer and more abundant, and the frontal concavity is deeper; last 

 abdominal segment with setae parted in median line. 



This species shows about the usual variation in size; the pronotal 

 asperities vary in development; the greatest differences are in the 

 relative abundance and distribution of the light and dark scales. 



