PROCELLARIID^ — THE TETRELS — FULMARUS. 



367 



\ 



c. Rodgersi. EODGERS' FULMAE. 



Fuhmrus Eodgersii, Cxss. Pr. Ac. Nat. Sci. Pbilad. 1862, 290. —CouES, ib. 1866, 29. — Baikd, 



Trans. Chicago Ac. I. 1869, 323, pi. 34, fig. 1. 

 Fubnarus glacialis,\a.i: Rodynrsi, CouES, Key, 1872, 327 ; Check List, 1873, no. 582 6. 

 Fuhnarus glacialis Rodgersi, Widow. Pr. V. S. Nat. Mus. Vol. 2, 188o, 209 ; Nom. N. Am. B. 1881, 



no. 705 b. 



Hab. True glacialis, North Atlantic Ocean, 

 south in America to coast of New England (Mass- 

 achusetts specimens in U. S. Nat. Mus.) ; F. glaci- 

 alis ylupischa, North Pacific Ocean, south to Western 

 Mexico ; Rodgersi, restricted to the North Pacific. 



Sp. Char. Adult (?) : Head, neck, and lower 

 parts, white ; upper surface bluish gray, the pri- 

 maries darker, the wing-coverts and tertials some- 

 times partly white. Bill, legs, and feet, greenish 

 yellow; iris yellow. Young (]) : Uniform cinere- 

 ous or sooty gray. " Bill dusky brown, blotched 

 and streaked with pale yellowish green ; inner side 

 of tarsus, with feet, very pale yellowish white ; 

 outer side of tarsus dark brown ; iris dark brown " 

 (L. KUMLIEN, MS.). 



Total length, about 18.00 to 20.00 inches ; wing, 

 11.80-13.75; culmen, 1.30-1.65; depth of bill 

 through base, .60-.80 ; tarsus, 1.65-2.15 ; middle 

 toe, 2.05-2.60. 



With a considerable series of specimens before 

 us, we are unable to detect constant differences be- 

 tween Fulmars from the North Pacific Ocean and 



those from the North Atlantic. In fact there is much more of individual than local variation in 

 this species, as regards size and proportions, while the color- variation is also chiefly individual. 

 The few and slight differences in coloration which appear to be at all suggestive of local differ- 

 ence in this respect are as follows : In all stages of plumage, specimens from the North Atlantic 



F. glacialis : dark jjhase. 





F. glacialis : light phase. 



F. glacialis Rodgersi. 



are of an appreciably, and in a majority decidedly, more bluish or " pearly " gray than those from 

 the North Pacific, and have, without exception, a dusky space immediately in front of the eye. 

 Not one of the three "adult" specimens shows any white on the wings. In all specimens from the 

 North Pacific the gray is much darker, of a more smoky hue ; some have no trace of dusky in 

 front of the eye, while others have a greater or less amount of white on the wing ; the type of 



