456 GEOLOGICAL SURVEY OF THE TEERITOEIES. 



ovate-lcinceolate nearly- half the length of the abdomen. Abdomen dis- 

 tinctly carined. Posterior femora not passing the abdomen. 



Color, (dried after immersion in alcohol.) — Eeddish-brown. Face testa- 

 ceous-brown; occiput brown, with a yellowish stripe each side; a glab- 

 rous black spot behind each eye, extending along each side of the pro- 

 Hotum to the posterior incision. Disk of the pronotum brown; a pale, 

 testaceous spot on the sides below the black stripe. Elytra brown and 

 unspotted, though in a few specimens very indistinct, dusty dots can 

 sometimes be observed. Posterior tibise reddish ; brown exteriorly, yel- 

 lowish beneath, (when living probably are like (7. femur -ruhrum.) 



Dimensions. — Length, .94 inch; elytra, .25 inch; j^osterior femora, .50 

 inch ; posterior tibiae, .45 inch. 



j^ebraska, (from the collection of Mr. 0. E. Dodge.) 



(BDIPODmi. 



CEdipoda, Latr. 



There are now, including the new species herein described, thirty-six 

 species of this genus known in the United States. I have been unusually 

 favored in my investigations of this genus, as I have had before me 

 specimens of thirty-one out of this number. Twenty-four species of this 

 genus are found west of Missouri, twenty of them being peculiar to that 

 region, so far as known. As will be seen, 1 have added eight new 

 KSjjecies to this already extensive group. 



(E. trifasciata, Walk., (Cat. Dermap. Salt., lY, p. 729.) 



Syn., Gryllus trifasdatus, Say, (Amer. Ent., Ill, PL 34.) 



PL I, Fig. 6. 



While at Cheyenne, during the last days of May, I noticed a number 

 of individuals belonging to this species in the pupa state, but saw none 

 that had yet acquired their full growth. I met with occasional speci- 

 mens in Utah, around Ogden, but many of these vary considerably 

 from the type, the black band across the wiug being much broader, and 

 the dark bands across the elytra less distinct. In fact, some of these 

 vary to such an extent that I have strong doubts in regard to their 

 specific identity, yet, as the variations are not regular, I have refrained 

 from describing them as new. 



(E. Haldemcmnii, Scudd., (Hayden's Geol. Eep. Neb., 253.) 

 (E. coralKpes, Hald., (Stansb. Eep., 371, PI. 10, Fig. 2.) 



These two species are very closely allied to each other, and I have 

 much doubt in regard to their being distinct. The former is described 

 by Mr. Scudder in his report on the Ortlioptera collected by Professor 

 Hayden in his geological survey of Nebraska, who claims that it is dis- 

 tinct from the latter. He says that it differs from the latter in the 

 greater rugosity of the pronotum, and in the greater separation and 

 distinctness of the markings of the elytra; but an examination of the 

 numerous specimens I have from Colorado, Wyoming, Utah, and 

 Nebraska shows every grade of difference, in these respects, from one 

 extreme to the other. It is true the specimens from Nebraska 

 correspond with Mr. Squdder's short description, but when we approach 

 the mountains these differences somewhat decrease, and when we pass 

 into Utah we find the other extreme, as given by Haldeman. I will 



