234 PROCEEDINGS OF THE NATIONAL MUSEUM. 



male, a little narrower than the interspace between the eyes, sulcate at 

 and below the ocellus, punctate throughout like the rest of the face 

 and genae; eyes of moderate size, only moderately prominent even in 

 the male, scarcely longer than the iufraocular portion of the genae; 

 antennae castaueous becoming slightly infuscated apically, consider- 

 ably more (male) or slightly less (female) than two thirds as long as 

 the hind femora. Pronotum subequal, faintly enlarging posteriorly, 

 especially in the female, the prozoua with a broad postocular piceous 

 band, beneath which the lateral lobes are dull navo-testaceous, the 

 disk broadly convex, passing by a broadly rounded angulation nowhere 

 forming lateral carinae into the vertical lateral lobes; median carina 

 distinct but very low on the metazona, subobsolete on the prozona 

 except at the extreme front j front margin truncate, hind margin obtus- 

 angulate; prozona quadrate or feebly longitudinal (male) or feebly 

 transverse (female), a little (male) or scarcely (female) longer than the 

 ruguloso-punctate metazona. Prosternal spine moderately large, 

 stout, appressed conical, very blunt, slightly retrorse; interspace 

 between mesosternal lobes subquadrate, a little longer than broad 

 (male) or transverse, but narrower than the lobes (female). Tegmina 

 abbreviate, about as long as the pronotum, overlapping, broad sub- 

 ovate, the costal margin convex, the apex acuminate, brownish fus- 

 cous, minutely flecked with fuscous. Fore and middle femora consid- 

 erably tumid in the male; hind femora rather robust, testaceous, rather 

 narrowly bifasciate with fuscous, the premedian fasciation angulate on 

 the outer face, the geniculation fuscous, the lower face paleflavous; 

 hind tibiae red, generally rather pale red, with an obscure fuscous patel- 

 lar spot, the spines black beyond their base, ten to eleven, rarely 

 twelve, in number in the outer series. Extremity of male abdomen a 

 little clavate, considerably recurved, the supraanal plate triangular, 

 the apex acutangulate, the median sulcus straight, rather narrow and 

 moderately deep, extending over the basal three fifths of the plate 

 between narrow 7 and sharp ridges, terminating abruptly; furcula con- 

 sisting of a pair of slight spinous denticulations shorter than the last 

 dorsal segment, overlying the base of the submedian ridges of the 

 supraanal plate; cerci small, subfalcate, slightly upturned but other- 

 wise straight lamellae, tapering gently from the base nearly or quite to 

 the middle, beyond equal, about two-thirds as broad as the extreme 

 base, apically rounded or subtruncate, much shorter than the supra- 

 anal plate; subgenital plate small, rudely subconical, terminating in a 

 feeble blunt tubercle. 



Length of body, male, 20 mm., female, 24 mm.; antennae, male, 8 

 mm., female, 7.5 mm.; tegmina, male, 6.25 mm., female, (3 mm.; hind 

 femora, male, 11 mm., female, 12.25 nun. 



Four males, 3 females. Loon Lake, Colville Valley, Washington, 

 July 23-25, S. Henshaw (Museum. Comparative Zoology; U.S.N.M. 

 Hi ley collection). 



