Petrels. 



104. Stormy Petrel; Mother Carey's Chicken (Tro- 

 cellaria pelagica). L. 5.5. Ads. Sooty black, brown- 

 er below; upper tail coverts white, tipped with black. 



Range. — North Atlantic; winters south to western Africa and New 

 Brunswick. 



I OS. Leach Petrel; Stormy Petrel (Oceanodroma 

 leucorrhoa). L.8., W. 6.2. Ads. Tail forked; above 

 sooty brownish black; below browner; lesser wing cov- 

 erts grayish brown', longer upper tail coverts not tipped 

 with black. Notes. An elfin-like crow of eight notes. 



Range. — North Atlantic and North Pacific; breeds from Maine to 

 Greenland and from Farallone to Aleutian Islands; winters south to 

 Virginia and California. 



106.1. Guadalupe Petrel (Oceanodroma macro- 

 dactyla). L. 8.4; W. 6.4; T. 3.9, fork 1 in. deep. Ads. 

 Similar to O. leucorrhoa, but with much longer and 

 more deeply forked tail, larger feet, shorter bill, and 

 very broad duskv tips to the upper tail coverts. 

 (Ridw. in Cat. B.' M.) 



Range. — Pacific Ocean; (Guadalupe Island, Lower California.) 



107. Black Petrel (Oceanodroma melania.) L. 9. 



Ads. Sooty black, paler below; wing-coverts grayish, 

 tail forked. 



Range. — South Pacific, north to Santa Barbara Islands; breeds on 

 Coronados Islands, southern California. 



108.1 Socorro Petrel (Oceanodroma socorroensis). 

 W. 5.5. Ads. Similar to No. 108, but wings longer; 

 tail shorter and less deeply forked; sides of rump 

 whitish; no white on under surface of v/ing. (Towns.) 



Range.— Pacific Ocean; (Socorro Island, southern California.) 



109. Wilson Petrel; Stormy Petrel (Oceanites 

 oceanicus). L. 7. Ads. Webs of feet with yellow 

 patch; tail not forked; longer upper tail coverts not 

 tipped with black. Notes. A weak weet, weet, and a 

 hoarse chattering patret-tu-cuk-cuk-tu-tu. (Wilson.) 



Range. Atlantic Ocean; breeds in Southern seas, (Kerguelen Is- 

 land in February) , and migrates north to Newfoundland, spending 

 summer off coast of eastern United States. 



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