314 REVIEW OF AMERICAN BIRDS. [PART I 



Synopsis of Species. 

 Chin, throat, and breast nearly iiniform mouse gray. 



Above uniform smoky brown. Under parts white, except 



as described. Crissum white, not banded . . . serripennis. 



Chin and throat reddish fulvous, in strong contrast with gray of 

 breast and sides. Belly tinged with sulphur yellow. Crissum, 

 white. 

 Above uniform brown, or with rump gradually paler, but 

 not contrasted with back. 



Crissum banded at end with blackish ; sulphur yel- 

 low of belly well marked .... ruficollis. 

 Crissum plain white ; belly scarcely yellow . . fulvipennis. 

 Above brown ; the rump appreciably and abruptly paler 

 (light gray). 

 Crissum banded at end with black . . . uropygialis 

 Crissum plain white(?). Color much darker and 



size smaller than preceding .... gutturalis. 



Stelgldopteryx serripennis. 



Eirundo serripennis, Add. Orn. Biog. IV, 1838, 593. — Is. B. Am. 1, 1840, 

 193, pi. f)l.—Cotyle s. Bon. Consp. 1850, 342.— Cassis.— Bkewee, 

 N. Am. Ool. I, 1857, 106, pi. iv, fig. 50 (eggs).— Baird, Birds N. 

 Am. 1858,313.— LoKD.Pr. R. A. Inst. IV, 1864, 116 (Br. Columbia). 

 — CoopEE & SocKiEY, P. R. R. Rep. XII, ir, 186 (W. Terr.)— Heer- 

 MANN, P. R. R. X ; Williamson's Rep. 36 (San Antonio, Tex. ; 

 breeding). — Stelgidopteryx s. Baird, Birds N. Am. 1858, 312. 



Hab. Whole United States (exclusive of N. E. States ?), south to Central 

 Mexico. 



(No. 32,269, % .) Above smoky brown, rather deeper on the head, perhaps 

 a little paler on the rump. Larger quills and tail feathers dusky brown ; the 

 secondaries and greater coverts sometimes lighter along their external edges. 

 The under parts (for about half the total length) from bill to and including 

 breast, with the sides of body and lining of wings, mouse gray, rather lighter 

 along the throat ; the rest of under parts, including crissum, white, the latter 

 with the shafts sometimes dusky, and very rarely with dusky blotches at the 

 ends of the longer feathers. 



Young birds (as 1,120) differ in a tinge of reddish fulvous on the upper 

 parts ; the wing coverts, secondaries, and inner primaries margined more or 

 less broadly with a brighter shade of the same. The gray of the under parts 

 is also washed with this color, especially on the chin and across the breast. 

 The hooks of the edge of the wing have not yet become developed. 



(No. 32,269, % , fresh specimen before being skinned.) Total length, 5.40 ; 

 expanse of wings, 12.20 ; wing from carpal joint, 4.50. 



(No. 32,269, % , prepared specimen.) Total length, 5.20 ; wing, 4.50; tail, 



