140 Wyoming Experiment Station. 



of their breeding places. They are partial to red sandstone 

 walls where there are slight crevices and wind-made cavities. 

 Usuallv the nests are ont of sight and I have reached into 

 an opening an arm's length and could not touch the nest. Al- 

 though common there are only a few collectors that have ob- 

 served this most gorgeous swallow. Coues reports this spe- 

 cies from Wind river and Grey Bull river ; Drexel captured 

 them at Fort Bridger and stated that they were numerous ; 

 Wood reports having taken them at Bridger pass and Medi- 

 cine Bow creek, 1857; Grinnell reports them from Medicine 

 Bow mountains and Yellowstone park. There are two skins 

 in the University collection. One was taken at Sand creek, 

 Albany county, and the other from Medicine Lodge creek, 

 Big Horn county. I have also noted these birds on the Sho- 

 shone river, above Cody, along Wood river, Paint Rock, Canon 

 creek and South Fork of Powder river. 



616. Riparia riparia (Linn.). 



Bank Swallow. 

 Summer resident; but can not say just bow abundant. 

 From present data they breed in greater numbers in northern 

 Wyoming than in any other place. But few have observed 

 them. Coues reports Hayden's specimen taken on the Wind 

 river in i860; Grinnell reports having seen them at Lake 

 Como ; Aiken found them near Sherman. There is one skin in 

 the University collection that was taken at Ten Sleep lake. 

 I have seen this species nesting in considerable numbers along 

 the vertical walls of the Big Horn and Grey Bull rivers and 

 have taken specimens from Chugwater creek. In June, 1902, 

 noted them nesting on the Big Popo Agie river east of Lander. 



617. Stelgidopteryx serripennis (Aud.). 



Rough-winged Swallow. 

 Probably a summer resident ; but data insufficient to war- 

 rant further suggestions as to its occurrence in Wyoming. 

 Bond has taken this species at Cheyenne, and Drexel reports 

 it from Fort Bridger. 



