302 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



First joint of the anterior tarsi with the tip slightly and transversely 

 produced beneath, the same bearing a tuft of modified spines which 

 obstructs the groove. 



Female. — Elytra quite evenly arcuately declivous behind, with the 

 apex feebly produced or simply subacute. Abdomen not impressed. 

 Anterior femora more or less sinuate in outer fourth. 



Measurements. — Males: Length, 30-33 mm. (with cauda) ; width, 

 13-14 mm. Females: Length, 26-33.2 mm; width, 13.5-15 mm. 



Genital characters^ male. — Edeagophore elongately oval, depressed 

 and not arched. 



Basale oblong, very moderately and evenly convex, sides feebly 

 arcuate. 



Apicale triangular, very slight^ longer than wide and rather 

 broad; surface rather feebly convex and not grooved; sides evenly 

 and not strongly arcuate to tip, the latter subacute ; base with a sub- 

 triangular lobe at middle, which is narrowly rounded at tip, feebly 

 sinuate laterally. 



Sternite transversely parabolic. Each lobe with the external mar- 

 gin evenly arcuate to apex, the latter somewhat broadly rounded ; in- 

 ternal border straight to feebly arcuate; surface very feebly convex, 

 shining, not very strongly chitinized at inner and basal third, sparsely 

 punctate, setae not long, those on the apical margin longer and not 

 very dense. Membrane not setose across the bottom of the sinus, the 

 latter broad. 



Female. — Genital segment robust, trapezoidal, valves reflexed ex- 

 ternally, strongly chitinized and setose. 



Valvula (Plate 5, fig. 1). — Dorsal plate oblong, strongly concave, 

 margins more or less reflexed ; surface glabrous, sparsely and strongly 

 punctate, setose, setae rather short and inconspicuous; external mar- 

 gin straight or feebly sinuate; apical margin inwardly obliquely 

 truncate, angle acute and as prominent apically as the apex, the lat- 

 ter quite short, robust and triangular, both sparsely set with short 

 seta}; internal margin arcuate or straight. Submarginal groove more 

 or less visible from above and quite moderate. 



A'p'pendage short and flattened, semielliptical, projecting but a 

 short distance beyond the margin of the fossa and eccentrically 

 placed. Fossa terminal, rather large and transverse. 



Superior pudendal memhraiie attaining the middle of the dorsal 

 plate and feebly longitudinally rugulose. 



Basal prominences quite well developed. 



Ventrolateral surfaces strongly convex, glabrous basally and more 

 or less concave before the aj^ex laterally, ver}^ sparsely and coarsely 

 punctate. Internal margins of the valves contiguous in basal and 

 apical fourths. Genital fissure rather broad and fusiform. Inferior 

 pudendal membrane closing the fissure in basal half. 



