in 



RKVIRW OF AMERICAN lilllDS. 



[taut I. 



n ' 



heing nisty yellowiBh-red, without distinguiBhing the throut m 

 darker. These characterH certainly do not apply to tho rmu/uay 

 skins in Capt. Page's collection, whatever they may to Bruziliaii 

 specimenB. These are moulting the large feathers of wing and tail. 



The characters given by Burmeister to the North American bird, 

 viz., "under parts white, the anal and crissal feathers aloue rusty 

 yellowish-red," do not belong to it, as shown above. 



In this connection I may state that in the collection is a specimea 

 of // riistica, of Europe, taken at sea during a voyage from Norfolk 

 to Rio Janeiro, probably carried westward by the prevailing winds 

 in the eecpiatorial region. 



Should, as is very probable, the South American bird prove identi- 

 cal with the more northern one, the name ru/a must be adopted m 

 having the priority. •, . .■ , , , ^ , • 



Specimens in the collection from the whole United States from 

 Atlantic to Pacific, and north 'to the boundary ; also — 



i 



It 



fr. ' ■ 



•J ,! ,: V r, Tachycineta, Cab. 



Tichycineta, Cab. Mas. Hein. 1850-1, 48. (Type //. thalaggina, Sw.) 



Nostr'U lateral, overhung or bordered internally by innumbent membrane. 

 Tarsi with the tibial joint covered by overhanging feathers, adherent a nhort 

 distance along inner face, about equal to middle toe without claw. Lateral 

 toes equal. Adhesion of basal joint of middle toe variable. Tail etnarginate 

 only, or slightly forked ; fork not exceeding half an inch in deptli. Color 

 blue or green above, with or without metallic gloss ; with or without woite 

 rump. Entirely white beneath. 



Under this head I combine several variations of form which shade 

 BO gradually into each other that I can scarcely define them even as 

 (subgenera. The type (thalansina) diifers from all the others iu a 

 small, narrow bill, weak feet, more extensively feathered tansu.s, and 

 iu a peculiar softness of the plumage without metallic gluss, seen 



