ZOOL— Vol. II.] LOOMIS— CALIFORNIA WATER BIRDS. 357 



year.^ Several young autumn and early December birds 

 from the vicinity of San Francisco, having the bill partially 

 developed, resemble Uria lomvia. One of these is some- 

 what melanistic, its upper parts being brownish black. It 

 is much darker than any other specimen in the Academy's 

 series of forty-three old and young birds taken at various 

 seasons. I have examined the specimen upon which Dr. 

 Cooper based his California record of Uria lomvia"^ and 

 find that it is an immature Uria troile. The specimen was 

 captured and mounted by Mr. W. G. Blunt, and by him 

 donated to the Academy. Several years ago, at my request, 

 Mr. Blunt examined the specimen, confirming that it was 

 the one identified by Dr. Cooper as Uria lomvia. 



Stercorarius parasiticus. Parasitic Jaeger. — A Jaeger, 

 having the central rectrices acuminate, was seen May 11. 

 It is probable that it was this species rather than S . longi- 

 caiidus. 



Larus glaucus. Glaucous Gull. — An immature speci- 

 men in worn plumage is referred to L. glaucus instead of 

 L. barrovianus, for the depth of the bill through the angle 

 is less than the depth through the base. The specimen was 

 secured May 4, and was with a flock of Western Gulls on 

 the beach near the Monterey wharf. 



Larus occidentalis. Western Gull. — Western Gulls 

 were abundant during the early part of my sojourn. Later, 

 however, they were not numerous, there being no nesting 

 colony in the vicinity. 



White-headed birds are frequently seen late in fall and 

 in winter. Generally such specimens have faint traces of 

 markings on the head or neck. 



Larus californicus. California Gull. — Some half a 

 dozen, heading northward, were seen on the ocean near 

 the buoy May 19. 



iCf. Calif. W. B. No. II, p. 21. 



2 Proc. Calif. Acad. Sci., Vol. V, p. 414; 'Auk,' Vol. Ill, p. 126. 



