45 G GEOLOGICAL SUE YE Y OF THE TEREITOEIES. 



ovate-lanceolate nearly' half the length of the abdomen. Abdomen dis- 

 tinctly carined. Posterior femora not passin^i: the abdomen. 



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

 ceoos-brown 5 occiput brown, with a j'ellowish stripe each side; a glab- 

 rous black spot behind each ej'e, extending along each side of the pro- 

 Hotiim to the posterior incision. Disk of the xnonotum brown: a pale, 

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

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

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

 lowish beneath, (when living probably are like G. femur-rtibriim.) 



Dimensions. — Length, .94 inch j elytra, .25 inch: posterior femora, .50 

 inch ) posterior tibi«, .45 inch. 



jS^ebraska, (from the collection of Mr. C. E. Dodge.) 



CEDIPODINI. 



CEDiroDA, Latr. 



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

 species of this genus known in tlie 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 arc found west of IMissouri, twenty of them being peculiar to that 

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

 species to this already extensive group. 



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



Sj'D., GryUiis trifasciafus, Say, (Aiucr. Eiit., Ill, PI. 3-1.) 



PL I, Fig. C. 



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

 of individuals belonging to this si)ecies 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 

 irom the type, the black band across the wing being much broader, and 

 the dark bauds 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 describiuii- them as new. '» 



'to 



Q^. Haldemannii, Scudd., (Ilayden's Geol. Pep. Neb., 253.) 

 (E. coraUipes, Hald., (Stansb. Pep., 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 Orthopcra collected by Professor 

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

 tinct from the latter. He says that it dillers from the latter in tlio 

 greater rugosit^^ of the prouotum, and in the greater separation and 

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

 Tiumerous 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. Scudder's short description, but when we ai>proach 

 the mountains these difL'ereuces somewhat decrease, and when we pass 

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



