^°g^^| yVnthony, Tivo New Birch from the Pdcijir Codst. 'in 



upper posterior border of the eyelid. I^ower lid white toi- nearly its 

 entire length. Cap delicate pearlj' gray, almost silvery white on the 

 anterior portion, in some H.L^hts gradually blending with color of nape on 

 the occiput. Rest of plumage deep slaty brown : primaiMes blackisii. 

 Wing, 263 mm. Tail, longest feather, 160; graduation, 53 ; cuhnen,4o; 

 depth, II ; tarsus, 25. 



Hal)., Cocos and Socorro Islands, Pacific Ocean. 



Named in honor of Mr. R. Ridgway, whose notes on the Cocos Island 

 birds (Birds of the Galapagos Archipelago, p. 645) first called my atten- 

 tion to this undescribed form. 



Ridgway's Noddy was nesting in abundance on a small rock 

 almost a mile west of the western end of Socorro Island. After 

 several unsuccessful attempts, a landing was made at the risk of 

 life and limb, and a series of eggs obtained. They were all laid 

 on bare rock without any attempt at nest building ; often placed 

 on protruding shelves but little wider than the egg, and how they 

 escaped rolling off into the sea is a mystery. Nearly all of the 

 eggs taken May 12 were fresh, though several downy young ones 

 were seen, together with the hundreds of young Sooty Terns 

 (^Sterna fuUginosa var. crissalis Baird) that swarmed all over the 

 top of the rock. The Noddies were not seen at San Benedicte 

 Island, 35 miles north of Socorro, nor at Clarion Island, 240 

 miles west. 



Oceanodroma kaedingi, sp. nov. Kaeding's Petrel. 



Sp. char. — -Similar to O. leucorhoa, but much smaller with much less 

 deeply forked tail. Type No. 8718, coll. A. W. A. At sea near Guada- 

 loupe Island, Lower California, July 25, 1897. 



General plumage sooty black. Head and neck more plumbeous, greater 

 and median wing-coverts pale sooty brownish. Longer upper tail-coverts 

 white with black shafts. Lateral lower coverts edged with white. Rec- 

 trlces sooty black, to base. 



Wing, 145 mm.; central rectrices, 73; lateral rectrices, S3; tarsus, 21 ; 

 middle toe and claw, 20; culmen, 15. 



Hab., from Socorro and Clarion Islands to Southern California. 



There seems to be considerable variation in the extent of the 

 white on the upper tail-coverts in the series before me. A few 

 have the coverts black with whitish patches on the sides, while 

 one has totally black coverts but is otherwise similar to the white- 



