312 PROCEEDINGS OP THE ACADEMY OP 



on the nape, of deep velvety black. Lower parts of neck all round, tail and its 

 coverts, four inner primaries, secondaries, greater part of greater coverts, tips 

 of tertials, except the innermost, and whole under parts, pure white. Mantle 

 slatey blue, extending quite to the tips of the inner tertials. Edge of wing, from 

 the carpal, with the bastard wing, black. First five primaries, with their shafts, 

 black ; their extreme tips, and the outer half of the inner webs, to near the end, 

 white. Other primaries white, the sixth with a touch of black on the outer 

 web ; web near the base, extending a little on the inner web. Emargination of 

 tail 1-25 inches. Length 13-75; wing 10-75. Bill 1-00, along gape 1-50, height 

 at angle -30 ; tarsus 1-25, middle toe and claw same. 



Habitat. Arctic America. Lake Winnipeg. (Kennicott.) 

 The preceding description was drawn up from a very beautiful and perfect 

 specimen, collected on Lake Winnipeg by Mr. Kennicott. 



Genus VIII. Creagrus Bonap. 

 Creagrus Bp. 1854. fide gen. Rep. 



25. Creagrus fdrcatus (Neboux.) 



Larus furcat us Neboux. Xema furcatus. Bruch 1S53. Creagrus furcatus Bruch 

 1855. 



Sp. Char. "Adult: Head and nearly all of the neck grayish brown; two 

 small rounded white spots embracing symmetrically the base of the upper man- 

 dible ; mantle grayish white; breast, abdomen, and under wing coverts white ; 

 wings extend beyond the tail ; primaries black on their inner and outer edges ; 

 the smaller wing coverts white ; the greater slate color bordered with white ; 

 tail very much forked and white, the two outer tail feathers much longer than 

 is usual in this class of birds ; bill very much bent, black at the base and white 

 at the extremity: iris red ; eyelids orange; tarsi and feet red; claws black. 



" Total length 60 centimetres." 



" Habitat. California." 



Of this rate and remarkable Gull I have never seen a specimen ; but copy the 

 description from the General Report, to complete this very cursory notice of the 

 Gulls of North America. 



Catalogue of Birds collected by the United States North Pacific Surveying and 

 Exploring Expedition, in command of Capt. John Rodgers, United States 

 Navy, with notes and descriptions of new species. 



BY JOHN CASSIS. 



1. Falco peregrinus, Gmelin. 

 From Japan. 



We find in the collection one very fine adult specimen, quite identical with 

 specimens from Asia in the Museum of the Academy, and the first ever brought 

 to this country from Japan. Mr. Stimpson's note is, "shot by Mr. Charles 

 Wright in the hills west of the city of Hakodadi, Island of Jesso, June, 1855." 



2. Mickonisus radius, (Gmelin). 



From China. " Hong Kong, March, 1S55, collected by Mr. Salvadora Pel- 

 key." (Mr. Stimpson.) 



3. Bcxbo vulgaris, Beclistein. 



Buteo vulgaris japonicus, Teinm. and Schleg., Faun. Japon. Aves, p. 16. 



From China. The only specimen is in light colored plumage and not adult. 



" Common about the harbor of Hong Kong, March, 1855." (Mr. Stimpson.) 



4. MiLvr.s GOVUmA, Sykes. 



Milvus melanotic, Teinm. and Schleg., Faun. Jap. Aves, p. 14, (1850). 



[Juue, 



