NO. 2255. 



CATALOGUE OF SIBERIAN BIRDS— RILEY. 



611 



Family PROCELLARIIDAE. 



7. FULMARUS ROGERSI Cassin. 



Two males, off Indian Point, August 8, 1914. 



These two specimens are very dark on the back, in fact darker 

 than any specimens of the light phase of Fulmarus g. glupischa with 

 which I have been able to compare them, but in measurements they 

 are nearer Fulmarus rogersi, which averages larger with a heavier 

 bill. The type of F. rogersi is a light-colored bird, in fact aberrant. 

 It is pure white, the interscapular region and scapulars with a pale 

 neutral gray wash ; wing-coverts with a few pale neutral gray spots ; 

 bend of the wing, border, and primary-coverts, mouse gray; pri- 

 maries and outer secondaries chaetura drab, with inner portion of 

 the inner web white; tail feathers mouse gray, white on the inner 

 web, except on the central pair. It is unsexed and measures : wing, 

 314; tail, 120; culmen, 38.5; depth of bill at base, 19.5. 



For comparison I append the following averages: 



Locality. 



Four males of F. rogersi 



Two males, off fndian Point , 

 Four males of F. g. glupischa 



Depth of 

 bill at 

 base. 



mm. 

 19.4 

 19.5 

 17.6 



Family ALCIDAE. 



8. FRATERCULA CORNICULATA (Naumann). 



One male, Emma Harbor, July 28, 1914. 



9. AEXmA CRISTATELLA (Pallas). 



One male, Emma Harbor, July 29, 1914. 



10. AETHIA PUSILLA (Pallas). 



One male, off Indian Point, August 8, 1914. 



11. CEPPHUS MANDTII (Mandt). 



One male. Cape Bolshaja Baranov, August 9, 1915. 



12. CEPPHUS COLUMBA Pallas. 



Four males and two females, Emma Harbor, July 22, 28, 29, Au- 

 gust 5 and 8, 1914. 



Very common, Emma Harbor. — C. A. 



Family LARIDAE. 



13. LARUS VEGAE Palinen. 



One male and one female, Emma Harbor, August 4 and 5, 1914; 

 one female, Ajan Island, August 17, 1914. 



