92 NEW- YORK FAUNA — BIRDS. 



THE BLUE-GREY WARBLER. 



SyLVICOLA CjERULEA. 



PLATE XL-V1IE. FIG. 107. 



Sylvia coeruiea. Wilson, Am. Orn. Vol 2, p. 141, pi. 17, fig. 5 (mole) ; and S. rara, Vol. 3, p. 119, pi. 27, tig. 



2 (young). 

 S. rara et azureu. Bonaparte, Ann. Lye. N. Y. Vol. 2, pp. 82 and 85. Id. Am. Ornith. Vol. 2, p. 27, pi. 11, 



fig. 2 (female). 

 Muscicapa cceru/ea. Audubon, folio, pi. 48 (adult). S. rara, pi. 49, (young) ; Orn. Biog. Vol. 1, pp. 255 and 258, 



and Vol. 5, p. 456. 

 Sylvicola ccerulec. Boxapahti:, Comp. List, p. 23. Audusox, B. of A. Vol. 2, p. 45. pi. 85 (males). 



Characteristics. Blue. Wings bifasciate with white. Tail with a white spot on the inner 

 webs near the tip. Length, 4^ inches. 



Description. Three outer quills subequal ; the first and second longest. Tail slightly 

 emarginate. 



Color. Above light verditer-blue, with a few dark streaks on the back. Frontlet and lores 

 black, extending to behind the eyes : a light streak over the eyes. Primaries black, mar- 

 gined with pale blue. Beneath white, with an obscure collar of dusky streaks over the 

 breast. Female, the blue above tinged with green. Stripe over the eye and all beneath 

 yellowish white ; the white on the tail obscure. 



Length, 4 - 5. Alar extent, 8"0. 



This little bird is exceedingly rare in the middle States, and I have never seen it in New- 

 York. As it has been observed near Philadelphia and in Nova-Scotia, it will doubtless be 

 found here, although it seems rather to prefer the eastern parts of the continent. It reaches 

 Louisiana from Mexico in the spring, and breeds there, returning in October. 



