. 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. Illustrated by 6 steel plates and upwards of 250 woodcuts. Birds. PROCELLAEIID^, PETRELS. GEN. 305, 306, 307. 329 305. Genus CYMOCHOREA Coues. 0 if" Leach's Petrel. Coloration as in the last si3ecies, with conspicuous white upper tail coverts, but apt to be lighter â rather of a grayish or even ashy tint on some parts. Much larger: length about 8 ; wing 6-6^ ; tail S-3i, forked; tarsus about 1 ; middle 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. Illustrated by 6 steel plates and upwards of 250 woodcuts. Birds. PROCELLAEIID^, PETRELS. GEN. 305, 306, 307. 329 305. Genus CYMOCHOREA Coues. 0 if" Leach's Petrel. Coloration as in the last si3ecies, with conspicuous white upper tail coverts, but apt to be lighter â rather of a grayish or even ashy tint on some parts. Much larger: length about 8 ; wing 6-6^ ; tail S-3i, forked; tarsus about 1 ; middle toe and claw the same ; bill §, strong. Both coasts; abundant on the Atlantic. P. leucorrJioaYiKiLL,., Nouv. Diet. XXV, 422; 0. leucorrhoa Coues, L c. 76. Thal- assidroma leacliii Nutt., ii, 326; Aud., vii, 219, pi. 459; Lawe. in Bd., 830. . leucorrhoa. K^^'Cl Black Petrel. Coloration as in the last species, but no white anywhere. Very large; 9 ; extent 18J ; wing 6|; tail 4, forhed an inch or more ; tarsus 1^; bill f. Coast of Calif(n-nia. Pro- fig. 211. Black Petrei. cellaria melania Bonap., Compt. Rend. 1854, 662; O. melania Coues, I. c. 76 (described from No. 13,025, Mus. S. I.) melania. ^â â â '\^) Ashy Petrel. Somewhat similar to the last, like it having no Avhite any- where, but plumbeous rather than fuliginous, and 7nuch smaller. Length about 7J ; wing about 5 ; tail 3^, forked about J an inch; tarsus under an inch; bill ^. California. Thalassidroma melania Lawr. in Bd., 829, pi. 90 (nee Bonap.). C. homocliroa Coues, I. c. 11; Elliot, pi. 87. homochroa. 306. Genus OCEANODROMA Reichenbaeh. ^-^ / Fork-tailed Petrel. Bluish-ash, paler below and on the greater wing coverts, dusky around the eye; quills and tail brownish, outer web of the external tail feather white ; bill black; feet dark. Length about 8 ; wing 6; tail 3^, forked; bill %; tarsus J. N. Pacific Coast, common. Cass., 111. i, 294, pi. 47; Lawr. in Bd., 829 furcata. (^'^/ > Hornhi/s Petrel. "Front,
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectbirds, bookyear1872
