186 



REVIEW OP AMERICAN BIRDS. 



[part I. 



(2,918.) Type of species from Mr. Audubon's collection. 



Dendroica nigrescens. 



Sylvia nigrescens, Townsend, J. A. N. Sc. VII, ii, 1837, 191 (Columbia 

 River). — Aud. Orn. Biog. V, 1839, 57, pi. 395. — Vermivora niy. 

 Bon. ; Nhtt. — Sylvicola nig. Aud. B. A. II, pi. B4. — Rhimanphus 

 nig. Cab. 18^0. — Dendroica nig. Baird, Birds N. Am. 1858, 270. — 

 ScLATEE, p. Z. S. 1858, 298 ; 1859, 374 (Oaxaoa ; high mountains, 

 in March).— Ib. Catal. 1861, 30, no. 183.— Heeemakn, P. R. R. Rep. 

 X, IV, 40.— CoopEK & SncKLEY, P. R. R. Rep. XII, ii, 1859, 180. 



? Sylvia halseii, Gieacd, Birds Texas, 1838, pi. iii, fig. 1, f (suggested 

 by Sclater). 



Hab. Western and Middle provinces of U. States. 

 into Western Mexico (Oaxaoa). 



Migratory southward 



An autumnal male from Fort Whipple differs only from No. 1,908 

 in greater amount of white edging to the wing feathers, wider streaks 

 on the sides, and absence of black on the back. 



(1,908.) Type of species from Mr. Audubon's collection. 



Dendroica caerulescens. 



Motacilla canadensis, Linn. Syst. Nat. I, 1766, 336 (not p. 334, which 

 is D. coronata). — Sylvia canadensis, L.\th. ; WnsoN, II, pi. xv fig. 

 7.— Ann. Orn. Biog. II, pi. 148, 155.— Sallk, P. Z. S. 1857, 231 (St. 

 Domingo) — Sylvicola canadensis, Swains., Jaed. ; Bon. ; Aud. B. A. 

 II, pi. 95 — Rhimanphus can. Cab. — Dendroica canadensis, Baied, 

 Birds N. Am. 1858, 271.— Sclatee, Catal. 1861, 30, no. 184.— Ib. 

 P. Z. S. 1861, 70 (Jamaica).— GfuKDL. Cab. Jour. 1861,326 (Cuba; 

 very common). 



