602 GEOLOGICAL SURVEY OF THE TEERITORIES. 



triangular process, incurved, and pointed on tip 5 the interior part 

 incurved in the same way and pointed on tip. 



Length, with the wings, 27 millimeters; expansion of the anterior 

 wings, 52 millimeters. 



Locality. — Quesnel Lake, British Columbia, August 27 (Mr. Crotch). 

 The extraordinary resemblance of 8t. gilvipes with PL dtripes is men- 

 tioned above ; the described characters prove nevertheless the difference 

 of ihe two species. 



EHYAGOPHILA. 



Two specimens in very poor condition from Long Peak and Divide, 

 June 3, Colorado, belong to this genus. The species is probably new, 

 but the specimens are not fit for a description. 



Besides the described imagos, a number of Phryganid cases, sometimes 

 with the larvse in alcohol, were collected. The previous stages of the 

 Phryganidce not being well enough known to determine them specifically, 

 I will only enumerate the groups to which they belong. There are from 

 the plains, July 1 to September 19, cases belonging to LimnepJiilidce, 

 I)robably to LimnephUus, Stenophylax, GoniotauUus, Mallesus, and some 

 to Fhryganea proper. 



From Little and Big Thompson, Este's Park, May, cases belonging 

 to Fhryganea, Limnex)hilus^ Rallesus. 



From foot-hills and mountains, July 1-19, cases belonging to Fhryganea, 

 LimnephUus, Stenophylax. 



Besides those, I have before me from Colorado, from South Park, Roar- 

 ing Fork, and Fair Play, cases belonging to Limnephilidw, Mystaeidce, 

 and Bhyacophilidce. 



List of the described species. 



The species without numbers were introduced in the present report 

 merely for the sake of comparison with other described species. The 

 occurrence of some of them in the territory embraced by the present 

 report is, however, very probable. 



PSEUDONEUEOPTERA. 



Family Tbrmittna. 

 Termopsis. 



1. T. angusticollis, var. Nevadensis, Truckee, Nevada ; the typical 



species from British Columbia, through California and Louisi- 

 ana. 

 — . T. occidentis, California ; west coast of Central America. 



Family Perlina. 

 Pteronarcys. 



2. Ft. californica, Washington Territory; California; Utah; San 



Luis Valley, Colorado. 



3. Ft. regular-is, Truckee, Nevada. 



4. Ft. badia, Bridger Basin, Wyoming; Cache Valley, Utah; Colo- 



rado Mountains. 



ACRONEURIA. 



5. A. abnormis, occurs from British America to Georgia, and perhaps 



Mexico; South Montana; Snake River, Idaho; Eagle River, 

 Colorado. 



