174 rnoCEKDIXGS of the national MVSEVM. vol. XX. 



mm., female, 6.5 ram.; tegmina, male, 13 mm., female, 13.5 mm.; bind 

 femora, male, 10 mm., female, 11.5 mm. 



Fifteen males, 23 femjiles. White Kiver, Rio Blanco County, Colo- 

 rado, July 24-August 14; Yellowstone, Montana, August (U.S.N.M. — 

 Kiley coIlecti(m; L. Brnner); Yellowstone Natioiuil Park, September 

 0-12; Salmon City, Lemlii County, Idabo, August (U.S.N.M. — 

 Ifiley collection); Washingt(m, Morrison (same.) 



Mr. Brnner, in an unpublisbed account of tbis species kindly placed 

 in my bands, says tbat the i)()int in Montana wbere this species was 

 taken is in the Yellowstone Valley above the mouth of the r»ig Horn 

 liiver; and he gives the following points of ditference between this 

 species and M. atlanis: 



In iniernudins the entire body is more or less covered vrith rather lonj; fine hairs, 

 the thorax is niucli lonj^er than in ntlauis — throwinjij the base of the posterior femora 

 considi-rably back of the middh — and in thi.s resj)ecL reseinblinj; Pezotettix [Milano- 

 phts'] n'a.shinfjtonia»ii8 Brnner. Tlie mah^ cerci are lonj^jer and narrower tli;m iu 

 atlanis, and are curved nlightly inward and upward on the apit-al half; they are also 

 shallowly grooved from the outside. The last ventral segment [subgenital plate] of 

 the male abdomen is a little shorter than in that species, and the prosternal spine is 

 also much longer, stouter, and more bluntly pointed than there. The general color- 

 i/atiou is much the f<ame as in atlanis but darker — being dull brown and gray above 

 and «liugy beneath ; there are no well-defined bands upon the posieri«)r femora, and 

 the tibiae are dull glaucous, more or less tinged with brown, especially on the basal 

 third and near the apex. 



It ditfers from 3/. atlanis, to whicb it is most nearly allied, in the 

 longer male antennae, the weaker median carina of the pronotum, the 

 more heavily marked bind femora, and its smaller and slenderer form. 



24. MELANOPLUS BILITURATUS. 



(Plate XII, fig. 5.) 



Calopienus hilUnralus Walkeh. Cat. Derm. Salt. Brit. Mus., IV (1870), p. 679. — 



Thomas, Kep. U. S. Groh Surv. Terr., V (1873), p. 160; Rep. U. S. Ent. 



Comm., I (1878), p. 43. — Packakd, Ibid., I (1878) p. [143].— Scudder, Proc. 



Host. Soc. Kat. Hist., XIX (1878), p. 289; Ent. Notes, VI (1878), p. 48. 

 Melaiiophts hilitiiratua CACLKiELn (pars). Rep. Ent. Soc. Ont., XVIII (1886). p. 71. 

 Culopfeniia (Mdanoplus) bilitnratiis ('ailfield (pars), Can. Rec. Sc, II (1887), p. 



401; (pars). Can. Orth. (1X^7), p. 13. 

 f Mdititoplus scriptua Cockerkll, Trans. Am. Ent. Soc, XX (1894), p. 337. 

 [Some of the synonymy given und<'r M. atlanis almost certainly belongs here.] 



A little above the medium size, rather robust, griseo-fuscous. Head 

 a little i)rominent, fusco-testaceous or fusco-plunibeous, generally more 

 or less infuscated above in longitudinal streaks and with a postocular 

 piceous band: vertex somewhat tumid, a little elevated above the pro- 

 notum, the interspace between ;he eyes half as broad again as the first 

 anteunal joint, or slightly broader than that in the female; fastigiuiu 

 steeply declivent, sulcate throughout, more deeply in the male than iu 

 the female; frontal costa failing to reach the clypeus, slightly narrowed 

 above but fully as broad as the interspace between the eyes, feebly sul- 

 cate at and below the ocellus, feebly and more or less biseriately punc- 

 tate throughout; eyes pretty large, rather prominent, distinctly longer 



