458 BULLETIN (5:5, UNITED .STATES NATIONAL MUSEUM. 



slightly and briefly arcuately declivous at base, and arcuately de- 

 clivous posteriorly as usual ; infexed sides not strongly oblique, 

 quite plane at the middle, feebly concave beneath the humeri and 

 distinctly so where it passes into the apex; surface smooth and obso- 

 lotely punctate, inflexed sides smooth and impunctate. 



Epipleurw smooth, impunctate and obsoletely defined, excej^t at 

 apex ; surface on the same plane as the inflexed sides of elytra. 



Steima and paraplewa^ smooth and more or less obsoletely sculp- 

 tured. 



Abdomen obsoletely sculptured and smooth; third segment more 

 or less oblique to the fourth and fifth segments which have a feeble 

 transverse convexity. 



Legs moderate in length and thickness. Anterior femora mutic, 

 tibial spurs quite similar and the tarsi are alike in the sexes, and 

 simple. 



Male. — Elytral disc rather obliquely arcuately declivous pos- 

 teriorly, apex acnte and just noticeably produced. Abdomen moder- 

 ately convex and broadly impressed on first two segments. Protibitp 

 briefly and moderately constricted at base. 



Female.— Klytral disc arcuately and more or less vertically decliv- 

 ous behind, apex simply subacute, abdomen rather strongly convex. 

 Protibiaj gradually and feebly narrowed at base. 



Measvrements. — Male: Length, 17 nun.; width, 8.^2 mm. Females: 

 Length, 15-17 mm.; width, 7.5-8.5 mm. 



Genital characters^ M<de. — Edeagophore elongate suhfnsifonn. six 

 to eight times longer than wide and more or less arched. 



Bas(de elongate and about five times longer than wide, sides more 

 or less feebly arcuate, surface moderately convex. 



Apicale elongately triangular; dorsal surface moderately convex, 

 withont median groove (in the few sj)ecimens examined), impunctate; 

 sides broadly and feebly sinuate; apex subacute and rather slender; 

 base bisinuate with a median triangular lobe. 



Sternite as in elongatuni. 



Female. — Genital segment triangular in outline, rather elongate, 

 surface quite plane and not setose. 



Valnda. (Plate 5, fig. 14). — Dorsal plate oblong-triangular; surface 

 very slightly concave, smooth, obsoletely and sparsely i)unctate; ex- 

 ternal l)order more or less sinuate; internal border very feebly arcu- 

 ate; ai)ical margin short and more or less feebly rouiuled or tnuicate, 

 directly continuous with the dorsal surface of the ai)ex in the internal 

 third, angle rounded, not setose. Ai)ex chitinous. })roduced and 

 arcuately everted, convex above and concave beneath, tip rounded, 

 excavated externally at base for the appendage, the latter rather 

 short mammilliform, with a few moderately long setae at tip. Basal 

 prominences obsolete. 



