GEOLOGICAL SURVEY OP THE TEEEITOEIES. 



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rifth group, Conoc&phaUni. 

 Conoceplialus 2 species. 



Sixth group, Fhaneropterini. 



Phaneroptera 2 species. 



Ephippitytha 1 species. 



ACEIDID^. 



I. Sub-family Ackidin^. 



First group, Truxalini. 

 Opomola 4 species. 



Third group, Acridini. 



Acridium 3 species. 



Caloptenus 10 species. 



Pejzotettix 5 species. 



Fourth group, Oedipodini. 



Brachypeplus , . . . 1 species. 



Boopedon 2 species. 



Stauronotus 1 species. 



CEdipoda , 26 species. 



(Gryllus formosus) „ 1 species. 



Acrolophitus 1 species. 



Stenobothrus 6 species. 



Oxycoryphus 1 species. 



If we divide that part of the United States west of Missouri into 

 three districts, as follows: the eastern, that portion east of the dividing 

 range of the Eocky Mountains ; the middle, that between the Eocky 

 Mountain and Sierra Nevada Eanges ; and the western, that west of 

 Sierra Nevada, the following tables will show the distribution of the 

 species described between these three districts : 



EASTERN DISTRICT. 



Gryllus personatus, Scudd. 

 abbreviatus, Serv. 

 Oecanthus niveus. 

 Nemobius vittatus. 

 Stenopelmatus fasciatus, Thos. 

 Ceuthophilus divergens, Scudd. 



pallidus, Thos. 



gracilipes, Scudd. 

 Udeopsylla robusta, Hald. 

 Daihinia brevipes, Hald. 

 Anabrus similis, Scudd. 



purpurascens, Uhl. 

 Coloradus, Thos. 

 Pterolepis (?) Haldemannii, Gir. 



Stevensonii, Thos. 



minutus, Thos. 

 Thamnotrizon scabricollis, Thos. 



Decticus (?) trilineatus, Thos. 



Orchelimum (I) 



Xiphidium saltans, Scudd. 

 Conocephalus attenuatus, Scudd. 

 crepitans, Scudd. ~ 

 Phaneroptera curvicadua. 

 Ephippitytha gracilipes, Thos. 

 Opomola brachyptera, Scudd. 

 bivittata, Serv. 

 Neo-mexicana, Thos. 

 Wyomingensis, Thos. 

 Acridinm emarginatum, Uhl. 

 frontalis, Thos. 

 ambiguum, Thos. ' 

 - Caloptenus viridis, Thos. 

 bivittatus, Uhl. 

 Dodgei, Thos. 



