140 PACIFIC COAST AVIFAUNA No. 14 



dt Great Falls with tlic Tree Swallow about May 1 (Williams, 1888a, p. Iti). 

 Dates of arrival at other points are : Pridley, Park County, May 14, 1909 ; Bis 

 Hole River, Silver Bow County, May 6, 1910; Anaconda, May 12, 1911. Dates 

 of departure are: Eight ilile Creek, Park County, August 24, 1908; Jefferson 

 River, August 25, 1909. 



There are no records of the securing of eggs in the state. 1 watched the 

 hirds nest-building on the Boulder River, Jefferson County, June 6, 1911, ;uk1 

 s' cured young able to fly on the Pend-Oreille River near Poison, July 23. 191 1 

 (1915b, p. 114). In the Bitterroot Valh-y it is stated to nest ui bird-houses, 

 though less commonly titan the Tree Swallow (Bailey, MS). 



264. Riparia riparia (Linnaeus) 



Bank S\v.\llow 



A summer resident throughout the state, locally common or abundant. Re 

 ported from nearly all localities, in some places as rare and in others as abund- 

 ant. Breeds in the Transition and Upper Sonoran zones in clay l)anks of i-ivers. 

 Where found, the nests are liable to be in large colonies. 



The migrations take place in ;\Iay and August. Three years at Bozcmau 

 give an average of May 15, with tiie earliest date May 7, 1912 (Oberholser, 

 1917, p. 327). Another date is from Choteau, JMay 26, 1912. Pall dates an-: 

 liozeman, August 28, 1912 (Oberholser, 1917, p. 328) ; Eight Mile Creek, Park 

 County, August 24, 1908. 



There are no records of the taking of eggs in the state. Young, not fledged 

 were found on Great Porcupine Creek, August 10, 1873, and fledged .young on 

 the Yellowstone near Custer Creek, Angtist 1, 1873 (Allen, 1874, p. 54). L dug 

 out several nests in Teton County early in June, 1912, but fouud none Uiat had 

 been completed at that date. 



265. Stelgidopteryx serripennis (Audubon) 



RdlTGlI-WlNGEn SwaLIjOW 



A summer resident evidently througliout the state, but records in the east- 

 ern half are not numerous, and the bird is omitted from many lists in t!ie west- 

 ern half. Explicit records are as follows: Gallatin County, one young bird tal.en 

 at Hillsdale, August 22, 1888 (Richmond and Knowlton, 1894, p. 30S i ; iMlles 

 City. May 30, 1902 (Hedges, coll. Univ. Montana) ; Flathead Lake, between 

 August 22 and 30, 1897 (Elrod, coll. Univ. ^Montana ) : Gallatin County, cormuon 

 summer resident (Saunders, 1911a, p. 45) ; southwestern Montana (Deer Lodgi>, 

 Jeffer.son, Silver Bow and southern Powell counties), summer resident (Saun- 

 ders, 1912a, p. 30) ; Teton County, summer resident (Saunders, 1914a, p. 140) : 

 Pend-Oreille River. Flathead Lake (Saunders. 1915b, p. 113': Belton. sMinmer 

 of 1915, seen u]) to August 8 (DuBois, ^IS). T have also seen this species in 

 Pai'lv ( 'ount.v. 



3Iif.ration dates are as follows: Missoula, average o1 two .vears Ajird 27. 

 earliest April 25, 1915 (.Oberholser. 1917, p. 329) ; Gregson, Silver Bow County, 

 -May 30, 11)10; Silver Bow. Mav 21. 1911: Choteau. Mav 22. 19V2. Fall dates 



