112 BULLETIN Gl], UNITED STATES NATIONAL MUSEUM. 



area. Membrane setose across the bottom of the sinus, the Litter 

 moderate in width. 



Fernale. — Genital segment quadrate and somewhat strongly setose. 



Valvula (Plate 1, fig. 11). — Dorsal plate oblong and slightly con- 

 vex antero-posteriorly ; external border straight to feebly arcuate, 

 apically not defined from the apical lobe, with internal border feebly 

 arcuate; surface more or less shining, rather coarselj^ punctate in 

 apical half and along the inner moiety to base, setose, setae rather 

 long and more or less flying. Apex wdth the outer lobe well de- 

 veloped, evenly rounded and equal in width to the outer two-thirds 

 of the dorsal plate, separated from the small and subacute internal 

 lobe by a more or less well-marked sinuation, both lobes clothed with 

 long flying hairs. 



Appendages sometimes visible from above, small and mammilli- 

 form. 



Superior piulendal meynhrane long reaching to the base of the small 

 internal lobe, and longitudinally inigulose. 



y entrolateral surface evenly convex, defined from (he apex and 

 explanate external border of the dorsal plate, by the submarginal 

 groove which passes arcuately inward to the fossa; surface sparsely 

 punctate and setose, setae rather short and recumbent. The internal 

 margins of the valves are contiguous in basal fifth; genital fissure 

 quite broadly fusiform with the inferior ])udendal membrane visible 

 in the basal half. 



Hahitat. — Texas (Cameron Countv, II. F. Wickham; Bosque 

 County, G. ^\. Belfrage). 



Number of specimens studied, 29. 



Type in the LeConte collection. 



Type -locality. — "Texas;" collected by Messrs. Schott, Ilaldeman, 

 and AVeise. 



Salient type-characters. — Somewhat shining. Thorax sparsely 

 punctulate, slightly convex; sides strongl}^ rounded, posteriorly 

 oblique, scarcely sinuate; base truncate; disc with a small impression 

 within the basal angles; apical angles wdth tips rounded. Elytra 

 with the dorsum deplanate, not margined; humeri acute and slightly 

 prominent ; disc sulcato-striate, stria? submuricately punctate, inter- 

 vals sparsely punctate, towards apex convex and asperate (LeConte.) 



Diagnostic characters. — Quickly separated from tricostata and 

 neomcxicana by its shining and glabrous integuments. The elytra 

 are feebly sulcate with the intervals more or less moderately convex. 



In the asperate form the surface luster is duller and the punctures 

 become more or less muricate, at the sides and apex aiv acute tubercles 

 which terminate in short yellowish bristles; the femora are also 

 sparsely clothed with recuml)eiit llavate hairs, that are not observed 

 in the typical form. 



