BIRDS SVl A'ICOLIDAK DENDROICA CANADENSIS. 271 



DENDROICA CANADENSIS, Baird. 



Black-tlirontcd Blue Warbler. 



Molacilla eanadtnsis, LiNVAErs, Syst. Nat. I, 17GG, 33G. — Gmelin, 1, 17P8, 991. 



Sijirij canademis, Latham, Index Orn. II, 179U, 539. — Wilsox, .\iii. Orn. II, I8I0, 115 ; pi. xv, f. 7. — Bonap. Obs. 



1806, No 145.— NuTT. Man. I, 1832, 398.— Acdubov, Ora Biog II, 1834, 309 ; pl. cxlviii,clv 



Sylvicola canadtiuis, "Sivaiksok," Jabd. Ed. Wilson, 1832— Ricii, List, 1837.— Bon. List, 1838 Id. Conap. 1850, 



308.— AtTD. Syn. 1839, 61.— Ib. Birds Am. II, 1841, 63 ; pi. xcv. 

 Bliimamphus canadensis. Cab. Journ. Orn. Ill, 1855,473. 

 Molacilla caeruUscens, Gmelin, Syst. Nat. I, 17^8, 960. 



Sylvia cieruUscens, Latham, Index Orn. II, 1790, 520. — Vieillot, Ola Am. Sept. II, 1807, 25 ; pl. Ixxx. 

 Sylvia pusitla, Wilson, Am. Orn. V, 1812, 100 ; pi. xliii, f. 4, (young.) 

 Sylvia Icucoptera, Wilson, Index and 2d ed. {Hall's cd.) II, 390. 

 Sylvia paluslris, Steiiiens, Shaw Zool. X, ii, 1317, 722. 

 " Sylvia mucropus, Vieillot," Gray. 

 Sylvia sphagnosa, Bonap. Obs. Wils. 1826, No. 164, {female.)- Nuttall, Man. I, 1832, 40C.— Acd. Orn. Biog. II, 



1834, 279. 

 Sylvicola pannosa, Gosie, Birds Jam. 1847, 162, {female.) 



Sp. Ch. — Above uniform continuous grayish blue, including the outer edges of the quill and tail feathers. A narrow frontal 

 line, the entire sides of head and neck, chin and throat, lustrous black ; this color extending in a broad lateral stripe to the tail. 

 Rest of under parts, including the axillary region, while. Wings and tail black above, the former with a conspicuous white 

 patch formed by the bases of all the primaries, (except the first ;) the inner webs of the secondaries and tertials with similar 

 patches towards the base and along the inner margin. All the tail feathers, except the innermost, with a white patch on the 

 inner web near the end. Length, 5.50 ; wing, 2.60 ; tail, 2.25. 



Female, olive green above and dull yellow beneath. Sides of head dusky olive, the eyelids and a superciliary stripe 

 whitish. Traces of the white spot at the base of the primaries and of the tail. 



Hab. — Eastern United States to the ^Missouri, south to the West Indies. 



The male and female of this beautiful species are very dissimilar, though the species may 

 always he recognized by the white patch at the base of the primaries, which I do not think 

 exists in any other Dendroica. The extent of this patch, however, in both male and female, 

 varies considerably. The colors of the female are strikingly similar to those of the female 

 Spiza ciris, or Nonpareil. 



The autumnal or young male has the back clouded with greenish olive, and the black feathers 

 of the throat much margined with whitish. There is also a white line over the eye, as in the 

 female. 



A skin (10102) from Washington, in high spring plumage, has the feathers in the middle of 

 the back bluish black, margined -with blue, giving rise to conspicuous spots. 



List of specimens. 



