158 UNIVERSITY OF COLORADO STUDIES 



Northern Violet-green Swallow. Tachycimta thalassina lepida. 



Boulder. 

 White -RUMPED Shrike. Lanius ludovicianus excubiiorides. 



Davis' Ranch; Crow Creek. 

 Yellow Warbler. Dendroica (estiva. 



St. Vrain; Little Thompson; Windsor. 

 Western Yellow-throat. Geothlypis irichas occidentalis. 



St. Vrain. 

 Long-tailed Chat. Icteria virens longicauda. 



St. Vrain. 

 Western Mocking Bird. Mimns polyglottos. 



Davis' Ranch; Crow Creek. 

 Catbird. Galeoscoptes carolinensis. 



St. Vrain. 

 Brown Thrasher. Toxostoma rufum. 



St. Vrain; Davis' Ranch. 

 Rock Wren. Salpinctes obsoletus. 



Boulder; Chalk Cliffs; Eastman's Reservoir; Davis' Ranch. 

 Canyon Wren. Catherpes mexicanus conspersus. 



Foothills west of Trilby. 

 Western House Wren. Troglodytes aedon aztecus. 



St. Vrain; Little Thompson. 

 Western Robin. Merula migratoria propinqua. 



Boulder; St. Vrain. 



5. List of Mollusks Collected 



By Juntos Henderson 



The foUowing recent Mollusca were collected by the expedition. 

 The SphcErium is a new species. 



Strophitus edentulus pavonius Lea 



Sphcerium hendcrsoni Sterki 



Pisidium compressum Prime 



Oreohelix slrigosa Gould 



Oreohelix slrigosa albofasciala Hemphill 



Pupilla blandi Morse 



Zoniloides arboreus Say 



Vallonia cyclophorella Ancey 



LymncBa caperata Say 



LymiiCBa obrussa Say 



Lymnaa paluslris Miill. 



