270 



LONG-WINGED SWIMMERS — LONGIPENNES. 



Xema Sabinii, L.vwu. in Bainl's B. N. Am. 1858, 857. — BAir.n, Cat. N. Am. B. 1859, no. G80. — 

 Saundeks, p. Z. S. 1878, 209. — Coue.s, 2d Check List, 1882, no. 790. 



Xema Sabinei, Couics, Pr. Philad. Acad. 1862, 311 ; Key, 1872, 317 ; Check List, 1873, no. 558 ; 

 B. N. \V. 1874, 66. — KiDGW. Nom. N. Am. B. 1881, no. 677. 



Xcvia collaris, " SciiKicir.r.ii.s," Pioss, in App. Pioss's Voy. Baf. Bay, IL 8vo ed. 1819, 164 (nee 

 ScuuEiBEiis, = Bhudiititelhia rosea I Cf. Saundeiis, P. Z. S. 1878, p. 209). 



Hab. Circuinpolar Regions ; in winter migrating south, in America, to Maine, New Yoik, the 

 Great Lakes, and Great Salt Lake, Utah. Very abundant in Ahiska. Bermudas, one instance 

 (Saunders). Macabi Island, coast of Peru, lat. 8° S. (one specimen, fide Saunders, P. Z. S. 

 1878, p. 210). 



Sp. Char. Adult, in summer : Head and upper part of the neck plumbeous, bounded below 

 by a well-defined collar of black, widest behind ; lower part of the neck, entire lower parts, tail, 

 upper tail-coverts, and lower part of rump snow-white, the lower parts faintly tinged with delicate 

 rose-pink in some freshly killed specimens. Mantle deep bluish gray (nearly the same shade as in 



Larus Franklini), the secondaries pure white, becoming gradually pale grayish blue toward bases ; 

 most of the exposed portion of the greater coverts also white, forming, together with the seconda- 

 ries, a conspicuous longitudinal white stripe on the closed wing. Four outer primaries black, 

 broadly tipped with white, the inner webs broadly margined with the same ; fifth quill with the 

 greater part of the inner web, and about 1.75 inches of the terminal portion of the outer, white, 



the remainder black ; remaining quills white ; outer 

 border of the wing, from the carpal joint back to the 

 primary coverts, including the latter and the alulae, 

 uniform black. Bill black, tipped with yellow ; eyelids 

 red ; iris brown ; " feet dull lead-color, claws black " 

 (L. M. Turner, MS.). Adult in winter : Similar to 

 the summer plumage, Itut head and neck white, except 

 occiput, nape, and auricular region, which are dull 

 dusky plumbeous. Young, first phminge : Crown, nape, 

 back, scapulars, wing-coverts, and rump brownish gray, each feather bordered terminally with light 

 fulvous or pale grayish bufi", this fulvous border preceded on the tertials, longer scapulars, etc., by 

 a dusky internal sub-border ; greater wing-coverts and secondaries white, as in the adult ; prima- 

 ries much as in the adult. Tail white, with a broad subterminal band of black, the tip narrowly 

 white or pale fulvous ; upper tail-coverts and entire lower parts white. Bill dusky, brownish 

 toward the base ; feet light brownish (in the skin). 



Wing, about 10.75 inches; culmen, 1.00; depth of bill through angle, -30; tarsus, 1.25; 

 middle toe and claw, 1.25. 



