94 Proceedings of the 



only during migrations and none were seen after the first 

 week in June in that~ valley. Evidently the lack of suit- 

 able nesting sites in immediate proximity to the Loup 

 river has deterred the birds from breeding there and they 

 do not seem to have adapted themselves to conditions as 

 perfectly as have the Rough-winged Swallows. 



107. Stelgidopteryx sernpcnnis (Audubon) — Rough-winged 



Swallow, 



This swallow was moderately common along the Loup 

 and Dismal rivers, breeding in cut banks along the latter 

 stream but forced by the nature of the country along the 

 Loup, near the Reserve station, to retire back into the 

 hills, where the action of the wind in forming the numerous 

 blowouts has packed the sand on one side of the hollows 

 enough to permit the excavation of a burrow there. So 

 far as I know the swallows do not go very far back from 

 the river, but usually select a suitable site on the first range 

 of hills or on one not far from it. They were commonly 

 seen coursing above the river as well as circling the hills 

 in the neighborhood of their nests. 



108. Bombycilla garrula (Linnaeus) — Bohemian Waxwing. 



On October 17, 1906, three specimens of the Bohemian 

 Waxwing were shot from out a flock at the Reserve by 

 one of the men and two of them forwarded to the Uni- 

 versity for naming. (See M. H. Swenk, Auk, xxiv, p. 

 223). 



109. Lanius borealis Vieillot — Northern Shrike. 



Individuals of the present species were noted on October 

 27 and 29, 1910, by M. H. Swenk. 



1 10. Lanius ludoviciamis ex cubit oridcs S w a i n s n — ^White 



rumped Shrike. 



From August 20 to September 3, 1911, 1 noted this Shrike 

 irregularly and supposed that the birds I saw were the 

 members of a family raised somewhere in the neighboring 

 plum brush along the river. In 1912 I noted this Shrike 

 on August 18, but as it was the only one seen throu^ghout 

 the entire summer I doubted my conclusions regarding the 

 birds of the preceding year. It is possible, however, that 

 the species breeds at certain places along the river, al- 

 though the fact is yet unproved. 



