(30 ^•ORTH AMERICAN BIRDS. 



/'. Tarsus 1.70, or more. 

 g\ Tail 3.10, or less. 



Above uniform sooty blackish, the head and 

 neck not perceptibly paler ; lower tail-coverts 

 mixed white and duskj^ in greatly varying 

 relative amount; length 13.00-15.00, wing 

 8.50-9.25, tail 2.G0-3.10, culmcn 1.35-1.40, 

 depth of bill at base .40-.45, tarsus 1.70-1.80, 

 middle toe 1.G5-1.70. Downy young: Sooty 

 brownish gray above, grajnsh white below. 

 Egg 2.3G X 1-62. Hab. Northern Atlantic 

 (chiefly the eastern side) and Meditei-ranean 



Sea 90. P. puffinus (Brunn.). Manx 



Shearwater. 

 g''. Tail 3.25, or more. 



Above uniform sooty slate, appreciably paler on 

 head and neck ; lower tail-coverts wholly- sooty 

 grayish; length 12.25-15.00, wing 9.00-9.10, 

 tail 3.25-3.80, culmcn 1.30-1.42, depth of bill 

 at base .35-.42, tarsus 1.75-1.85, middle toe 

 1.68-1.75. Egg 1.79 X 1-27. Ilab. raeific 

 coast, from Lower California to British 



Columbia 93. P. opisthomelas Coues. 



Black-vented Shearwater. 

 p. Tarsus 1.65, or less. 



g^. Lower tail-coverts with more or less of dusky. 



h}. Above uniform sooty black ; white of under side 

 of head extending upward nearly or quite to 

 the eye, sometimes involving part of the lores ; 

 length about 11.00, wing 7.60-8.40, tail 3.50, 

 culmen 1.20-1.25, depth of bill at base .35, 

 tarsus 1.50-1.65, middle toe 1.45-1.60. Egg 

 2.05 X l-i5- Ila^- Warmer parts of Atlantic 

 Ocean, north, casually, to coast of New Jer- 

 sey 92. P. auduboni Finscii. Audubon's 



Shearwater. 

 /t^ Similar in color to P. auduboni, but sides of neck 

 and breast slaty, the feathers with white mar- 

 gins; wing 7.20-7.80, tail 2.95-3.25, culmen 

 .98-1.05, tarsus 1.40-1.45, middle too, with 

 claw, 1.52-1.60. JIab. Pacific Ocean ? (" King 

 George's Sound" '), west to the Seychelles. 



P. tenebrosus Pklz. Pelzeln's Shearwater.' 



' Latuam ("Syno]i8i8," iii. )it. ii. ji. 417) says "King fiwrgc's .Sound, on the American const"; but voN 

 Pelzels (Ibis, 1873, p. 47) thinks that thia ia a mistake, King George's Sounil on the west coast of Australia 

 being meant instead. ' J'njffinui Icncbrosue Pels, Ibis, 1873, 47. 



