336 PROCEEDINGS OF THE NATIOXAL MUSEUM. vouxx. 



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

 as the hind feinoia. I'ronotum rather iiniforin, subeciual, the ineta/oua 

 bioadeninfj: slif^Mitly, especially in the male, 8ub})iiiK'tate; median 

 carina distinct throujjhout, but much sli<f liter on the prozona than on 

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

 transverse sulci of prozona distinirt throughout, unusually sinuous, not 

 severin*^ the median carina; prozona transverse, occasionally in the 

 male subquadrate, distinctly lonj^er 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 (nuile) 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 

 elavate, ii little recurved, the supraanal i)late rounded triangular, the 

 extreme apex exeised, 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 the width aiul comi)ressed. almost 

 immediately broadening again, curving inward while they run back- 

 wark and ui)ward, and forking, the u[)per branch directed upward and 

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

 longer than broad, com})ressed and ai)ically rounded; the other arm 

 much longer, nearly as long as the rest of the appendage, slen<ler, 

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

 little arched fnmi 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 0.25 

 mm., fenude ().5 mm.; tegmina, male 10.5 mm., female 13 mm.; hind 

 femora, male S.75 mm., female 10.5 mm. 



Forty-one nmles, 52 females. ]\Iedicine Hat, Assiniboia, September 

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

 Yakima Hiver, opposite Elleusburg, Kittitas County, Washington, S. 

 Henshaw (Museum Comi)arative Zoology); Salmon City, Lemhi Couniy, 

 Idaho, August (U.S.X.M. — Kiley collection); Yellowstone, Montana, 

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

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

 County, \Vyoming, 0,800 feet, August 0; Cheyenne, Laramie County, 

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

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

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

 11-10: (Jarland, Costillo County, Colorado, 8,000 feet, August 28-21); 

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

 (U.S.N. M.— Riley collection). 



It has also been reported from Regiiia, Assiniboia, by Caullield. 



