102 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Genital charactei's^ mule. — Edeagopliore elongately ovate, very 

 feebly arched. 



Basdle oblong, about three tmies longer than wide; surface evenly 

 and moderately convex; sides feebly arcuate. 



Apicale triangular; surface evenly and moderately convex, groove 

 semi-membranous and rather broad, extending from near tip to base ; 

 sides arcuate in basal third, thence broadly and moderately sinuate 

 to apex, the latter narrowly rounded; base subtruncate. 



Ster-nite subparabolic. Each lobe with the apex somewhat ex- 

 trorsely terminal; external border rather straight at basal third, 

 thence arcuate to apex, the latter somewhat rounded; internal border 

 arcuate; surface more or less convex, punctate and setose in apical 

 half, setse moderate in length and sparse. Membrane sparsely setose 

 across the bottom of the sinus, the latter deep. 



Female. — Genital segment moderate in size, more or less trapezoi- 

 dal, valves more or less reflexed externally, somewhat feebly cleflexed 

 at apex, setose ; external border rather strongly explanate, often less 

 so toward apex. 



Valvula. — Dorsal plate oblong, sides slightly converging apically; 

 surface rather plane, glabrous, sparsely punctate and setose, setsp 

 longer in apical moiety; external border usually feebly and broadly 

 sinuate from the rather prominent basal angle; apical margin not 

 distinct from the external lobe, the latter broadly and not very evenly 

 arcuate, very feebly defined from the internal lobe l)y a minute sinu- 

 ation; apex clothed with rather long seta^; internal border more or 

 less sinuous; internal lobe small. 



Appendaffe minute within the transverse fossa. 



Superior pudendal membrane longitudinally rugulose and not quite 

 reaching the internal apical lobe. 



Ventrolateral surface moderately convex in basal two-thirds, thence 

 broadly and feebly concave to apex ; submarginal groove broad be- 

 neath the explanate external border of the dorsal plate and becoming 

 continuous with the general concavity; surface sparsely j)unctate and 

 finely setose, seta^ longer on apex. Internal margins of the valves 

 contiguous at basal fifth, subcontiguous apically; fissure rather 

 broadly fusiform, and closed in basal half by the inferior pudendal 

 membrane. 



Ilahitat. — Arizona (Thomas Casey) ; Idaho (?). 



Number of specimens studied, 2 (male and female). 



Type in Colonel Casey's collection. 



Type-locality. — Arizona. 



Scdient type-characters. — Rather robust. Head coarsely and rather 

 closely punctate. Prothorax with apex broadly, feebly emarginate; 

 base transverse, very broadly, feebly sinuate toward the middle; sides 

 strongly arcuate at apical third, thence strongly convergent and 



