336 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL.XX. 



antennae about three-fourths (male) or over two-thirds (female) as long 

 as the hind femora. Pronotuin rather uniform, subequal, the metazona 

 broadening slightly, especially in the male, subpunctate; median 

 carina distinct throughout, but much slighter on the prozona than on 

 the metazona; lateral carinae tolerably distinct throughout, but blunt; 

 transverse sulci of prozona distinct throughout, unusually sinuous, not 

 severing the median carina; prozona transverse, occasionally in the 

 male subquadrate, distinctly longer than the metazona. Prosternal 

 spine short, stout, erect, conico-cylindrical, appressed, more so in the 

 female than in the male; interspace between mesosternal lobes half as 

 long again as broad (male) or transverse, but narrower than the lobes 

 (female). Tegmina attaining, generally surpassing a little, the tips of 

 the hind femora, slender, feebly tapering. Extremity of male abdomen 

 clavate, a little recurved, the supraanal plate rounded triangular, the 

 extreme apex excised, fully as broad as long; furcula reduced to a pair 

 of minute and blunt triangular teeth; cerci thickened and tumid at 

 base, immediately narrowing to half tlie width and compressed, almost 

 immediately broadening again, curving inward while they run back- 

 wark and upward, and forking, the upper branch directed upward and 

 inward, nearly as large as the basal expansion, subtriangular, a little 

 longer than broad, compressed and apically rounded; the other arm 

 much longer, nearly as long as the rest of the appendage, slender, 

 tapering, but bluntly pointed and directed backward and inward, a 

 little arched from beneath; subgenital plate narrow and equal except 

 for the abrupt and considerable elevation of the extreme apical margin, 

 which is mesially notched. Basal tooth of the lower valves of the ovi- 

 positor large, triangular, sharp, as long as broad. 



Length of body, male 15.5 mm., female 20 mm.; antennae, male 6.25 

 mm., female 6.5 mm.; tegmina, male 10.5 mm., female 13 mm.; hind 

 femora, male 8.75 mm., female 10.5 mm. 



Forty-one males, 52 females. Medicine Hat, Assiniboia, September 

 (U.S.N.M. Eiley collection) ; Fort McLeod, Alberta, September (same) ; 

 Yakima Eiver, opposite Ellensburg, Kittitas County, Washington, S. 

 Henshaw (Museum Comparative Zoology); Salmon City, Leinhi County, 

 Idaho, August (U.S.N.M. Eiley collection); Yellowstone, Montana, 

 August (same); Mandan, Morton County, Xorth Dakota (same); Doug- 

 las, Converse County, Wyoming, Bruner (same); Evauston, Uintah 

 County, Wyoming, 6,800 feet, August 6; Cheyenne, Laraniie County, 

 Wyoming (L. Bruner); Colorado (U.S.N.M. Eiley collection); Colo- 

 rado, 5,500 feet, Morrison; Florissant, El Paso County, Colorado, 8,000 

 feet, August 17-22; South Park, Colorado, 8,000 to 10,000 feet, August 

 11-16; Garland, Costillo County, Colorado, 8,000 feet, August 28-29; 

 Fort Robinson, Dawes County, Nebraska, August 21-22, L. Bruner 

 (U.S.N.M. Eiley collection). 



It has also been reported from Eegina, Assiniboia, by Caulfield. 



