I.— A LIST AND DESCBIPTION OF NEW SPECIES OF OK- 



THOPTERA. 



By Prof. Cyrus Thomas. 



LIST. 



GRYLLIDES. 



Stenopelmatus, Santa F6, New Mexico. Too much mutilated to be determined. 

 Gryllus abbreviatus, Serv. Found throughout eastern Colorado. 



Oecanthus niveus, Harr. Found along the streams from Fort Fetterman to Eaton 

 Mountains. 



LOCUSTARL3S. 



Anabrus Raldemannii, Girard. South Park, Colorado, and near Laramie Eiver east of the 

 Black Hills, Wyoming. 



Anabrus Stevensonii, Thos. Northeastern New Mexico. 



Anabrus minutus, Thos. Northeastern New Mexico. 



Thamnotrizon {Anabrus) purpurasecens, Uhler. South Park, Colorado, and near Lara- 

 mie Eiver, east of the Black Hills, Wyoming. 



Thamnotrizon trilineatus, Thos. Northeastern New Mexico, and South Pass, Wyoming. 



Ephippitytlia gracilipes, Thos. Southeastern Colorado. 



Orchelimum vulgare, Harr. Found throughout the eastern part of Colorado and 

 Wyoming. 



Xiphidium fasoiatum, Serv. Colorado. 



Udeopsylla robusta, Hald. Throughout Colorado, Wyoming, and Utah. 



Ceuthophilus divergent, Scudd. Hardscrabble Creek, Colorado, and Eed Buttes, 

 Wyoming. 



ACRIDII. 



Opomola neo-mexicana, Thos. Northern New Mexico, and along Cottonwood Creek, 



Wyoming. 

 Acridium flavo-fasciatum, De Geer. Southeastern Colorado. 

 Caloptenus bivittatus, Say. Colorado, Wyoming, and Utah. 

 Caloptenus spretus, Uhler. I have traced this species from the borders of Nevada and 



Idaho on the west, to Missouri and Iowa on the east, and from the Eaton Mountains 



on the south to the Big Horn Mountains on the north, but have discovered its limits 



only toward the south and east. 

 Caloptenus femur-rubnim, De Geer. Common east of the Eocky Mountains. 

 Pezotettix borealis, Scudd. Mountains east of Middle Park. 

 Pezotettix picta, Thos. From Cheyenne south to the Arkansas Eiver. 

 Brachypeplus magnus, Girard. Along the head-waters of the Arkansas, and near the 



Laramie Eiver east of the Black Hills. 

 Boopedon nubilum, Thos. Near Canon City, Colorado. 

 Boopedon flavo-fasciatum, Thos. Southeastern Colorado. 

 Oedipoda Carolina, Linn. Found at a few points in Colorado, especially south of 



Denver. 

 Oedipoda corallipes, Hald. Colorado, Wyoming, and Utah. 

 Oedipoda aequalis, Say. Common in Colorado and Wyoming. This is an extremely 



variable species. 

 Oedipoda trifasciata, Thos. Common throughout Wyoming, Colorado, Northern New 



Mexico, and Northern Utah, on the elevated plateaus. 

 Oedipoda neglecta, Thos. Eastern Colorado and North Platte Valley, west of Fort 



Fetterman. I have also collected some specimens in Southern Illinois which appear 



to be identical with this species. 

 Oedipoda carlingiana, Thos. Colorado and Wyoming. 

 Oedipoda cincta, Thos. Southeastern Colorado. 

 Tomonotus Mexicanus, Sauss. New Mexico. 

 Tumonotus nietanus, Sauss. Southeastern Colorado and Southeastern Wyoming 



