BIRDS—SY1-VICOLIDAE——-DENDROICA CANADENSIS. 271 
DENDROICA CANADENSIS, Baird. 
* Black-throated Blue Warbler, 
Motacilla canadensis, Linnakgus, Syst. Nat. I, 1766, 336.—Gmetin, I, 1788, 991. 
Sylvia canadensis, Laruam, Index Orn. II, 1790, 539.—Witson, Am. Orn. IT, 1810, 115 ; pl. xv, f. 7—Bowap. Obs. 
1826, No. 145.—Nurr. Man. I, 1832, 398.—Avpunon, Orn. Biog II, 1834, 309 ; pl. exlviii,elv 
Sylvicola canadensis, ‘‘Swainson,”’ Jarp. Ed. Wilson, 1832—Rrcu, List, 1837.—Bon. List, 1838.—Is. Consp. 1850, 
308.—Avp. Syn. 1839, 61.—In. Birds Am. II, 1841, 63; pl. xcv. 
Rhimamphus canadensis, Cas. Journ. Orn. UI, 1855, 473. 
Motacilla caerulescens, GMELIN, Syst. Nat. I, 1788, 960. 
Sylvia cerulescens, Laruam, Index Orn. II, 1790, 520.—Vieitior, Ois. Am. Sept. II, 1807, 25; pl. Ixxx. 
Sylvia pusilla, Wirson, Am. Orn. V, 1812, 100; pl. xliii, f. 4, (young.) 
Sylvia leucoptera, Witson, Index and 2d ed. (Hall’s ed.) II, 390. 
Sylvia palustris, Steruens, Shaw Zool. X, u, 1817, 722. 
Sylvia macropus, Viettuot,’’ Gray. 
Sylvia sphagnosa, Bonar. Obs. Wils. 1826, No. 164, (female.)—Nutrati, Man. I, 1832, 406—Auvp. Orn. Biog. II, 
1834, 279. 
Sylvicola pannosa, Gosse, Birds Jam. 1847, 162, (female.) 
Sp. Un.—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 ina broad lateral stripe to the tail. 
Rest of under parts, including the axillary region, white. 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.—FEastern 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 be 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. 
Catal.| Sex. Locality. When collected. Whence obtained. Length. | Stretch | Wing. 
No. of wings. 
2577 3 Carlisle:;Pat=2e8=52252-%) May 5, 1846 ...... 8. EiyBairds. 2b. sngheses 5.41 8. 00 2.58 
788 3 BewaseOOnsotsccccossscse Oct. 2) W842i 26 esses. dose eaee Saonee nae 4, 83 1.83 2. 58 
2305 OF jlescecc dOnaea nae aaenoe Oct. 10; 1842) 222) coo On aeaame ea smectanic 5.16 7.83 2.41 
PEO erscbel bocape doz2one DOsBeoeSE=e Sept, /O, 18456 oot coos doze = see wooseesas 5. 00 7. 66 2.41 
8645) |s-<co se Capetloridas a2 asessas— See ot cea Ga Wurdemannyas=seccse 4,75 7.75 2.50 
S04 60) ae nae eee | see dossesnos Pots soi csloves eee | fering con ee soles = Sc ici | mice CO sccccecetcanwse 5. 00 7.00 2.50 
7307 3 Cleveland, Ohiowaeaecser |paeoe nee eae scce Jebe Kortlandsssocccswecl|acoaceacleccaceas' aoa aaa 
BYES | eseeece Racine} Wissosssesscsse-|oncccsecas see asas Dre HOY snensasscarseece aan acne. |aee—e a= aa 
fol Cook county, Ill.....-... August 31_-.....- ReennicOttsoe c=sosses|=aee mcm aa ace eee Roee 
