BIRDS — LARIDAE — LAEUS CUALCOPTERUS. 



843 



Journal fiir Ornith. Juli, 1855, p. 281, applies so well to the adult specimens before me, that I 

 have no doubt of their being the same. His account, in which no measurements are given, is 

 very concise and is as follows : 



" Resembling L. glaucuf altogether, with the exception of the wing feathers, which in this 

 species are ashy gray with round white spots on the points." 



He puts L. glaticopterus, Kittlitz, as a synonym, but gives no references where to find the 

 descriptions of either author. 



The omission to make references to the original descri2)tions of species prevails throughout 

 Dr. Bruch's very valuable monograph ; it would have added much to its usefulness if this had 

 been done when citing authorities. 



List of specimens. 



LAEUS LEUCOPTERUS, Faber. 



The White-winged Gnll. 



Larus leucopterus, Faber, Prodr. Isl. Orn. 1820, 91.— BoNip. Syn. 1828, No. 301.— Rich. & Sw. F. B. A. II, 1831, 



418.— Ndtt. Man. II, 1834, 305.— Aud. Birds Amer. VII, 1844, 159 ; pi. ccccxlvii. 

 Laroides leucopterus, Bruch, Cab. Journ. 1855, 281. 

 Leucus leucopterus, Bon. Cons. Av. II, 1856, 217. 

 " Larus islandicus, Edmonston." 

 Larus glaucoides, Temm. 



Sp. Ch. — Adult. Back and wings pale bluish gray ; the terminal part of the quills and their shafts, as well as the rest of the 

 plumage pure white ; bill bright yellow, with an orange red spot on the lower mandible towards the end ; legs and feet pale flesh 

 color. « 



Length, 26 inches ; wing, 17| ; tail, 6i ; bill about 2 ; tarsi, 25. 



Hah. — Arctic seas, Baffin's Bay, Labrador. 



LAEUS CHALCOPTERUS, Lawrence. 



The Gray-winged Gnll. 



" Laroides chalcopterus, Light." Brdch, Rev. Lar. in Cab. Jour. 1855, 282. 

 Leucus chalcopterus, Bon. Cons. Av. II, 1856, 216. 



The only notice of this species I have met with is in Bruch's Monograph of Gulls, referred to 

 above ; his description is as follows : 



" Resembles very much L. leucopterus, except in the wing feathers, which are ash gray with 

 round while spotted points ; the young are dark gray like L. glaucopterus." 



Hah. — "American coast of Behring's Straits and Greenland." 



