174 PROCEEDINGS OF THE NATIONAL MUSEUM. 



mm., female, 6.5 mm.; tegmiaa, male, 13 mm., female, 13.5 mm.; liind 

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



Fifteen males, 23 females. White Eiver, Eio Blanco County, Colo- 

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

 Eiley collection; L. Bruner); Yellowstone National Park, September 

 6-12; Salmon City, Lemhi County, Idaho, August (U.S.N.M. 

 Eiley collection); Washington, Morrison (same.) 



Mr. Bruner, in an unpublished account of this species kindly placed 

 in my hands, says that the point in Montana where this species was 

 taken is in the Yellowstone Valley above the mouth of the Big Horn 

 Eiver; and he gives the following points of difference between this 

 species and M. atlanis: 



In intermedius the entire body is more or less covered with rather long fine hairs, 

 the thorax is much longer than in atlanis throwing the base of the posterior femora 

 considerably back of the middle and in this respect resembling Pezotettix [Mclano- 

 plu8~\ washing tonianus Bruner. The male cerci are longer and narrower than in 

 atlanis, and are curved slightly inward and upward on the apical half; they are also 

 shallowly grooved from the outside. The last ventral segment f 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- 

 ization is much the same as in atlanis but darker being dull brown and gray above 

 and dingy beneath; there are no well-defined bands upon the posterior femora, and 

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

 third and near the apex. 



It differs from M. atlanis, to which it is most nearly allied, in the 

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

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



24. MELANOPLUS BILITURATUS. 



(Plate XII, fig. 5.) 

 Caloptenus Ulituratus WALKER, Cat. Derm. Salt. Brit. Mus., IV (1870), p. 679. 



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



Comm., I (1878), p. 43. PACKARD, Ibid., I (1878) p. [143]. SCUDDER, Proc. 



Bost. Soc. Nat. Hist., 'XIX (1878), p. 289; Ent. Notes, VI (1878), p. 48. 

 Melanoplus bilituratus CAULFIELD (pars), Rep. Ent. Soc. Ont., XVIII (1886), p. 71. 

 Caloptenus (Melanoplus) bilituratus CAULFIELD (pars), Can. Rec. Sc., II (1887), p. 



401; (pars), Can. Orth. (1887), p. 13. 



f Melanoplus scriptus COCKERELL, Trans. Am. Ent. Soc., XX (1894), p. 337. 

 [Some of the synonymy given under M. atlanis almost certainly belongs here.] 



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

 a little prominent, fusco-testaceous or fusco-plumbeous, 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 the eyes half as broad again as the first 

 antennal joint, or slightly broader than that in the female; fastigiuin 

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

 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 



