294 EEVIEW OF AMEKIOAN BIRDS. fPART I. 



Tarsi slightly feathered on inner face at upper end ; equal in 

 length to middle toe without claw. 



Tail rery deeply forked Hirundo. 



Tail slightly forked or emarginate .... Tachycmeta. 

 Tarsi entirely naked ; lengthened, equal to middle toe and 

 half its claw. 



Tail considerably forked Callichelidon. 



HiBTiNDO, Linn. 



Nostrils lateral. Tarsi short, not exceeding middle toe without its claw ; 

 the upper joint covered with feathers, which extend a short distance along 

 the inner face of tarsus. Tail very deeply forked ; the lateral feather much 

 attenuated, twice as long as the middle. Basal joint of middle toe free for 

 terminal fourth on outside, for half on inside. 



In type, and in American species, forehead and throat rufous; a black 

 pectoral collar ; tail feathers with large light spots on inner webs. 



But two species, perhaps only one of this subgenus, as restricted, 

 belong to America. There are, however, quite a number found in 

 the old world. 



Hirundo horreorum. 



Eirundo horreomm, Barton, Fragments N. H. Penna. 1799, 17. — Baird, 

 Birds N. Am. 1858, 308.— A. & E. Newton, Ibis, 1859, 66 (Sta. 

 Cruz ; transient). — Sclater & Salvin, Ibis, 1859, 13 (Guatemala). 

 — ScLATER, P. Z. S. 1864, 173 (City of Mex.). — Lawrence, Ann. 

 N. Y. Lye. 1861, 316 (Panama).— Cooper & Sdckley, P. R. R. Rep. 

 XII, II, 184 (south of Columbia River). 



Eirundo rufa, Vieill.— Cassin, 111.— Brewer. N. Am. Ool. I, 1857, 91, 

 pi. V, fig. 63-67 (eggs).— Cab. Jour. IV, 1856, 3 (Cuba; spring 

 and autumn). — Reinhardt, Ibis, 1861, 5 (Greenland ; two speci- 

 mens). — GuNDLACH, Cab. Jour. 1861, 328 (Cuba; common). 



Eirundo americana, Wilson, Am. Orn. pi. 38, fig. 1, 2. — Rich. — Lembete, 

 Aves de Cuba, 1850, 44, lam. vii, fig. 2. 



Eirundo rustica, Ann. Orn. Biog. II, pi. 173. — Ib. Birds Am. 1,^1. 48. — 

 Jones, Nat. Hist. Bermuda, 34 (Bermudas ; Aug. and Sept.). 



Hah. Whole of United States ; north to Fort Rae, Slave Lake ; Grreenland ; 

 south in winter to Central America and West Indies. Not found at Cape St. 

 Lucas. 



The steel blue of the upper parts of this species has a decided 

 violet tinge, sometimes purplish. The black or steel blue pectoral 

 collar is very rarely continuous below in adults ; when it is, it is 

 usually formed in the centre by only one or two series of feathers, 

 which are black to the down. The rufous of throat is a little darker 



