651 



BLUE-GREY WARBLER. 



(Sylvia caerulescens.) 



Sy. supra ccerulea, suhtus alba,jugulo nigro, alts caudaque nigrt» 

 cantibus. 



Warbler above blue, beneath white, with the jugulum black, 



and the wings and tail dusky. 

 Sylvia caerulescens. Lath, Ind. Orn, 2. 520. SQ. — Vieil. Ois, dg 



VAmer. Sept. 2. 25. 

 Sylvia canadensis. Lath. Ind, Orn. 2. 53g. 11 7. — Wils, Amer, 



Orn. 2. 115. 



Motacilla caerulescens. Gmel. Si/st, Nat, 1. q6o. 

 Motacilla canadensis. Lin. Si/st. Nat. 1. 336. 42. — Gmel. Syst. 

 Nat, 1. 991. 



Ficedula Canadensis cinerea minor. Briss. Orn. 3. 527. 68.^^. 

 17. f, 6, 



Figuier bleue. Biiff*. Hist, Nat. Ois, 5. 304. 

 Petit figuier cendre de Canada. Buff, PI, Enl. 685./. 2. 

 Fauvette bleuatre de St. Domingue. Buf. Hist, Nat, Ois, 5. 

 164. 



La Fauvette bleuatre. Vieil, Ois. de VAmer. Sept. 2. 25. pi, 

 80. 



Blue-grey Warbler. Lath. Gen. Syn. 4. 440. 35. 

 Blue Flycatcher. Edvcards. Glean.pl. 252. 

 Black-throated Warbler. Pen. Arct. Zool. 2. 399. 2^5.— -Lath, 

 Gen. Syn, 4. 487. 110. — Wils. Amer. Orn, 2, 115. xv./ 7. 



The Black-throated Warbler is four inches and 

 a half in length: its beak is black: the upper 

 parts of its body deep grey -blue: quills dusky 

 black; the primaries with a white spot near the 

 base, and edged with pale grey-blue : the sides of 

 the head, the throat, and fore-part of the neck, 

 are black : the belly and under parts whitish; the 



