140 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



of tlie inetatibia slightly longer tiiaii the exlernal. Anterior tarsi 

 v^ery slightly dissimilar in the sexes; first joint scarcely produced 

 ventro-apically ; groove distinct. 



Male. — Somewhat narrow, scarcely robust. Elytra about one-third 

 longer than wide. Abdomen moderately convex. Anterior tibial 

 spurs quite short ; first joint of the anterior tarsi with the spinules of 

 the apico-marginal angle not noticeably produced. 



Female. — Robust. Elytra rather broadly oval, about one-sixth 

 longer thaii wide. Abdomen strongly convex, anterior tibial spurs 

 moderately long and slightly curved. First joint of the anterior 

 tarsi with the spinules of the apico-marginal angles noticeably pro- 

 duced. 



Measurements. — Males: Length, 8.5-10.2 mm.; width. 4-5 mm. 

 Females: Length, 9.8-12 mm.; width, 5.1-6 mm. 



Genital characters., male. — Edeagophore of the usual general form, 

 elongate, depressed and scarcely arched. 



Basale about five times longer than the apicale, oblong; surface 

 nearly plane and narrowly, rather suddenly convex at the sides, the 

 latter feebly arcuate. 



Apicale short, equilaterally triangular, convex at the sides and 

 apex, dorsal surface nearly j)lane with a median linear, longitudinal, 

 membranous groove at middle two-fourths; sides arcuate in basal 

 third, thence moderately sinuate to apex, the latter blunt, the lateral 

 sinuations giving it the appearance of being ])roduced ; base nearly 

 evenly arcuate. 



Sternite slightly transverse. Each lobe with the external border 

 nearly straight in basal two-thirds, thence evenly arcuate to the 

 internal border, angle obsolete; internal margin straight or feebly 

 sinuate; surface shining, rather d(Misely punctate in apical two- 

 thirds, setose, setic moderately long about apical margin. Sinus deep, 

 narrow and ti'iangidar. 



Female. — (lenital segment subeqnilaterally triangular, not strongly 

 chitinized, setose. 



Valrula. — Dorsal plate rather narrowly ami elongately oblong- 

 triangular in outline; surface more or less feebly concave, shining, 

 sparsely, \'eiT finely piuiclalc and setose in ajucal half; external bor- 

 der more or less arcuat(»; internal bordei* more oi- less sinuous; ajiical 

 margin not defined from the apex, angle obsolete; apex short and 

 triangular. 



Apj>etid<((/e short conico-manunilliform, fossa small; seta^ on apex 

 and ai)]:)(Midage sparse, somewhat flying and slightly longest at {'\\) 

 of the appendage. 



Superior piKletitlal memhrave reaching to th(> middle of the dorsal 

 plates and finely longitudinally rugulose. Basal prominences feeble. 



Ventrolateral surfaces as in />ilosa. 



