248 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



E pi pleura rather narrow, gradually narrowing from base to apex; 

 surface obsoletely punctiilate and smooth. 



Sterna subglabrons, more or less obsoletely punctate and rugose. 



Parapleiircv more or less obsoletely ])unctate. 



Abdomen horizontal, smooth and more or less shining, very sparsely 

 and obsoletely punctulate, most strongly punctate on the last two 

 segments, more or less rngulose. 



Legs moderate in length and quite slender ; anterior femora armed 

 in both sexes; tibial spurs similar, the anterior subequal and acute; 

 anterior tarsi simple. 



Male. — Elongate, oval, scarceh^ robust or ventricose, somewhat 

 attenuated behind; elytra arcuatel}^ and obliquely declivous pos- 

 teriorly, apex rather narrowly rounded ; abdomen moderately convex 

 and rather broadly impressed on the jfirst three segments; anterior 

 femora with an acute and moderate tooth. 



Feinale. — Ovate and somewhat ventricose, not noticeably attenu- 

 ated behind ; elytra arcuately declivous posteriorly. Abdomen rather 

 strongly and evenly convex. Anterior femora obtusely and not 

 strongly dentate. 



Measurements. — Male: Length, 25 mm.; width, 10.2 mm. Fe- 

 male: Length, 29 mm. ; width, 11.5 mm. 



Genital characters^ male. — Edeagophore elongately fusiform, 

 scarcely arched and somewhat dei^ressed. 



Basale oblong oval, narrowing cephalad, moderately convex, sides 

 slight!}^ arcuate. 



Ajncale triangular, rather broad, subclepressed ; surface very mod- 

 erately convex, with a median and slightly widened linear membra- 

 nous groove at middle two-fourths ; sides feebly arcuate from base to 

 apex, the latter subacute and not in the least produced; base rather 

 broadly lobed at middle and broadl}^ sinuate laterally. 



Sternite transverse. Each lobe rather short and broad, and sub- 

 triangulo-parabolic in outline; external border arcuate to apex, the 

 latter broadly rounded and quite continuously so with the internal 

 margin; surface slightly convex externally, glabrous and shining in 

 basal tw^o-thirds and coarsely punctate, setose in the apico-internal 

 third; setjc quite long and rather dense. Sinus broad and apparently 

 closed by membrane, the latter not setose at bottom. 



Female. — Genital segment trapezoidal, comparatively small, sides 

 reflexed and more or less concave, not conspicuously setose. 



Yalvvla (Plate 5, fig. 18). — Dorsal plate oblong-oval, with a mod- 

 erate antero-posterior convexity, concave, infernal fourth reflexed. 

 external three-fourths graihially and obliquely so; surface smooth 

 and glabrous, not noticeably punctate nor setose; extenuil and inter- 

 nal borders more or less feebly arcuate; apical margin evenly arcuate, 



