604 GEOLOGICAL SURVEY OF THE TEERITOEIES. 



Subfamily CorduUna. 

 Epitheca. 



32. U. semicircular is, Twin Lake, Colorado; Arcade River and Pacific 



slope of mountains, Colorado; Ogden, Utah; Vancouver's Island 

 and Gulf of Georgia. 



Subfamily ^schn.na. 



^SCHNA. 



33. JE. constricta, Yellowstone; foot-hills of Colorado; common every- 



where east of the Mississippi. 



34. JEJ. multicolor, Yellowstone ; Vancouver's Island ; Upper Mis- 



souri ; Texas ; Mexico. 



35. JS. pro;pingus, Yellowstone ; Colorado plains. 



Subfamily GompMna. 

 Ophiogomphus. 



36. 0. severus, foot-hills and plains ; Fort Garland, Col. 

 — . 0. colubrinus, Canada, Quebec. 



— . 0. rupinsulensis, Illinois ; Upper Wisconsin ; Maine. 

 — . 0. mainensis, Maine. • 



Hekpetogomhus. 



37. H. compositus, Yellowstone ; Oregon ; Texas. 



GOMPHUS. 



38. G. olivaceus, Humboldt River, Nebraska ; California. , 



Subfamily Galopterygina, 

 Hetjerina. 



39. H. calif ornica, Yellowstone ; California. 



Subfamily Agrionina. 

 Lestes. 



40. L. disjuncta, Yellowstone. 



41. L. congener, Yellowstone ; foot-hills of Colorado. 



42. L. liamata, Pacific slope of Colorado Mountains. 



Argia. 



43. A., spec. (?), (group of A. moesta), Yellowstone. 

 Agrion. 



44. A., spec. (?), (group oi A. prcevarum), foot-hills of Colorado. 



ISCHNURA. 



45. I., spec. (?), (group of 1. iners), foot-hills of Colorado. 



NEUROPTERA. 

 » Family Hemerobina. 



POLYSTOECHOTES. 



46. p. |)MwctotMS, Yellowstone; foot-hills and Twin Lakes, Colorado. 



MlOROMUS. 



47. M., spec. (?), (group of M. sohrius), foot-hills of Colorado. 

 Hemerobius. 



48. H., spec. (?), (group of R. alternatus), Fair Play, Col. 



