. Key to North American birds; containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary . t; extent 26 inches ; wing 7^-8 ; tail 4^, graduated an inch ; billIJ; tarsus If; middle toe and claw under 2. S. Atlantic Coast, as far asthe Middle States, common. Nutt., ii, 337; Aud., vii, 216, pi. 458;Lawr. in Bd., 835 obscurus. Black-vented Shearwater. Like the last; crissum and lining of wingsmostly blackish ; sides of head dark below the eyes ; ratiier larger; bill If;wing 9; tail 3f, thus shorter; t
. Key to North American birds; containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary . t; extent 26 inches ; wing 7^-8 ; tail 4^, graduated an inch ; billIJ; tarsus If; middle toe and claw under 2. S. Atlantic Coast, as far asthe Middle States, common. Nutt., ii, 337; Aud., vii, 216, pi. 458;Lawr. in Bd., 835 obscurus. Black-vented Shearwater. Like the last; crissum and lining of wingsmostly blackish ; sides of head dark below the eyes ; ratiier larger; bill If;wing 9; tail 3f, thus shorter; tarsus IJ ; middle toe and claw 2J. CapeSt. Lucas (Nos. 16,990-1, Mus. Smiths. Inst.). Seems to be distinct fromthe last, but may be the same as an exotic species of prior nanae. Coues,Proc. Phila. Acad. 1864, 139 opisthomelas. ft Below, dark, much like the upper parts. Sooty Shearwater. Dark sooty brown, blackening on the quills and tail,paler and grayish below, usually with some whitish on the lining of thewings ; bill dark; feet dark outside, pale on the inner aspect. Length 18 ;extent 40; wing 12; tail 4; bill l%-2 ; tarsus 2|-2i; middle toe and claw 332 PYGOPODES, PIVING 2i. North Atlantic, iibundaut; S. at least to Carolina (Coues). A specialstate of P. major? Strickland, Proc. Zool. Soc. 1832, 129; DeKay,New York Birds, 287, pi. 136, f. 298; Lawr. iu Bd., 834; Coues, Proc. Phila. Acad. 1864, 123. FULIGINOSUS. Darl-bodied Sliear-water. Similar to thelast; feet flesh color,slightly obscured out-side ; lining of wingsmostly white ; smaller; Fig. 212. Sooty Shearwater. wing 11, Ctc. Cape St. Lucas. Very doubtful. I allow this, and several others, to stand, becauseit is still uncertain what reduction of the species of this genus Avill provenecessary. JVectris amaurosoma Coues, I. c. 124. . Shearivater. Plumage as in the foregoing; size less; tailshorter; bill smaller. Bill dusky-greenish, with yellow; feet yellowish,blackish behind and under t
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