290 BULLETIN 14 5, UNITED STATES NATIONAL MUSEUM 



ately large, rather broadly oval, and equally rounded above and 

 beneath. 



Pronotum one-third wider than long, about equal in width at base 

 and apex, and widest at middle; sides slightly arcuately rounded 

 from apical angles to base ; when viewed from the side the marginal 

 carina is strongly sinuate and strongly deflexed anteriorly, the sub- 

 marginal carina nearly straight, the two carinae widely separated 

 anteriorly, and connected to each other near the middle; anterior 

 margin moderately sinuate, and the median lobe broadly rounded; 

 base slightly emarginate at middle of each elytron, the median lobe 

 feebly, broadly rounded, and truncate in front of scutellum; disk 

 moderately convex, with two broad, deep median depressions, con- 

 nected by a narrow groove, a broad, oblique depression on each side 

 along lateral margin, and with sharply defined, long prehumeral 

 carinae; surface vaguely granulose, feebly but not closely rugose, 

 sparsely, finely punctate, and sparsely clothed with short, recumbent, 

 whitish hairs. Scutellum strongly, transversely carinate, and the 

 surface finely, densely reticulate. 



Elytra slightly wider than pronotum at base, and feebly wider at 

 base than behind middle ; sides slightly rounded for a short distance 

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

 arcuately expanded behind the middle, then obliquely narrowed to 

 the tips, which are strongly emarginate and serrulate ; sides of abdo- 

 men narrowly exposed above; disk feebly longitundinally depressed 

 along sutural margins, with feeble indications of a costa on each 

 side, sutural margins slightly elevated posteriorly, and with broad, 

 shallow basal depressions; surface feebly, coarsely imbricate-punc- 

 tate, and ornamented with pubescent designs as in lecontei. 



Abdomen beneath obsoletely granulose, sparsely, finely punctate, 

 the punctures denser and connected transversely by fine, sinuate 

 lines on basal segments, and sparsely clothed with short, recumbent, 

 whitish hairs ; first segment convex, without a median depression ; last 

 segment broadly rounded or subtruncate at apex; vertical portions 

 of segments not conspicuously pubescent; pygidium rather strongly 

 carinate, but the carina not projecting. Prosternum finely, sparsely 

 punctate, and sparsely clothed with short, erect, inconspicuous hairs ; 

 prosternal lobe broad, rather strongly declivous, and broadly, deeply, 

 arcuately emarginate in front; prosternal process broad, the sides 

 strongly expanded behind the coxal cavities, then transversely trun- 

 cate to the apex, which is acute. Tibiae slender, anterior pair feebly 

 arcuate, and the anterior and middle pairs armed with a short tooth 

 on inner margin at apex. Posterior tarsi distinctly shorter than 

 tibiae, and the first joint about as long as the following two joints 

 united. Tarsal claws dissimilar; anterior claws cleft near the tip 



