BIRDS CYPSELIDAE — CHAETURA VAUXII. 



14; 



CHAETURA VAUXII, DeKay. 



Oregon Swift. 



ri;;)sr(iis vaiixii, Townsend, J. A. N. Sc. VJII, 1839, 148, (Col. river.)— Is. Narrative, 1839. 

 Cliaetura vauxii, DeKay, N. Y. Zool. II, 1844, 36. 



^can(/(j'/ts vatijcii, Bonap. Comptes Rendus, XXVIII, 1854 ; notes Delattre, 90. — Cassin, III. I, 1855, 250. — 

 Newberry, ZooI. Cal. and Or. Route, 78; P. R. R. Surv. VI, 1857. 



Sp. Ch — Light sooty brown ; rump and under parts paler ; lightest on the chin and throat. Length, 4.50 inches; wing, 

 4.75 ; tail, 1.90. 



Hab. — Pacific coast, from Pugct's Sound to California. 



This species bears a very close resemblance to the common chimney birds of the eastern 

 States^ being only readily distinguishable by its much smaller size, less than 4^ inches instead 

 of 5^. The wing, too, is nearly an inch shorter. The tarsus and the middle toe, however, 

 seem absolutely longer. The rump is a little paler than in C. pelasgia, as well as the under 

 parts, where the chin and throat are lighter, almost dirty white, and gradually becoming a 

 little darker behind, although even the hinder part of the belly is much lighter than the back, 

 instead of being of the same color with it. 



This species, though probably not rare on the western coast, has only been collected by J. K. 

 Townsend (his specimen in the Phila. Academy) and by Dr. Kennerly of American explorers. 

 Delattre, however, brought it from California. It is very closely allied to several small South 

 American species, and may have been described under another if not a prior name. 



List of specimens. 



19 b 



