Si6 



SNODGRASS AND HELLER 



nor in its vicinity. Its absence there may be due to its preference for 

 nesting in bushes, Clipperton being absokitely destitute of vegetation. 



We have no specimens, in the w^hite pkimage, from Cocos Island. 

 Three in this plumage from Wenman and Culpepper Islands of the 

 Galapagos group, taken in December, have the tail feathers above 

 and below brovs^n, whitening only at the tips. Three specimens from 

 Clarion Island, one taken in November and the other two in August 

 are colored exactly the same in this respect, the shafts of the feathers 

 in all cases being white. This is exactly as in the type described by 

 Rothschild. Rothschild and Hartert had twenty-four specimens of 

 this bird from Clarion Island and the Galapagos. Among tkese was 

 one that had a white tail. Hence, this variety occasionally duplicates 

 Sula piscatrix in the color of its plumage. 



The collection contains one male, in white plumage, taken from 

 Clarion Island in August, and three from Wenman and Culpepper 

 Islands, Galapagos, taken in December ; one immature male in brown 

 plumage froiti Cocos Island, taken in July ; two immature females, 

 in brown plumage, taken from Cocos Island in July and four from 

 Wenman and Culpepper, taken in December. 



There is one specimen of Stda piscatrix in the Stanford University 

 collection taken in June near the Hawaiian Islands. Its tail is entirely 

 white. This specimen measui^es as follows: Wing 360 mm., tail 

 231, culmen 81, depth of bill at base 28, tarsus 28, middle toe 56. 



MEASUREMENTS, IN MILLIMETERS, OF Sultt ^iscatrix wcbsteri, 



(adult SPECIMENS.) 



FREGATA AQUILA (Linnaeus). 



Pelecanus aqtiila Linn^us, Syst. Nat., Ed. x, Vol. i, p. 133, 1758. — Roths- 

 child AND Hartert, Novitates Zoologicas, vi, p. 175, 1899 (Galapagos). 



Fregata aqidla and Fregata aquila fntnor RiDGWAY, Proc. U. S. Nat. Mus., 

 XIX, pp. 590, 591, 1896 (Galapagos) 



