ORNITHOLOGICAL EXPLORATIONS. 



List of specimens collected. 



65 



No. 89121. — Iris light yellowish gray. Bill intense lemon-yellow ; tips of both mandibles whitish; 

 a vermilion red spot on each side of the angle of the gony.s; corner of mouth flesh-color. Naked pye-ring 

 reddish flesh-color. Feet flesh-colored ; tarsus faintly tinged with brownish; nails black. 



No. 89122. — Iris dirty white with a creamy tinge. Bill yellowwith red spot. Feet flesh color : t.irsns 

 faintly shaded with bluish. 



No. 92826. — Iris faint yellowish white with blackish mottlings. Bill yellowish white, pure straw 

 yellow on culmen in front of nostrils and along tomia : a reddi.sh orange spot with dusky shadings on 

 lower mandible; corner ot mouth flesh-color, as is also the naked oye-ring. Feet reddish fiesli-color, 

 lighter below ; webs more reddish ; nails bluish black. 



No. 92827. — Iris dark brown. Bill black ; tip, abruptly, light brownish flesh-color; angle <if tiKinth 

 dull reddish flesh-color; naked eye-ring dark brownish gray. Feet dark brownish gray. 



As in the other members of the genus Larus, there is an iucrease of 

 the white on the primaries with the age of the individual. Thus, in 

 No. 89122 (which is a rather young bird, with the tail still uniform gray, 

 but which has already assumed the bluish mantle), the iirst primaries 

 are uniform gray with a brownish tinge, and without any distinct 

 pattern. 



l!^o. 89121 is somewhat older, having the tail wholly white, excei>t 

 the middle pair of rectrices, which is mottled with gray. In this speci- 

 men the primaries are very much worn, but the pattern as it was in 

 the fresh feathers is plainly visible, agreeing closely with several other 

 specimens in the National Museum; on the first primary is a subapical 

 mirror, beyond which the tip is gray, with indications of the extreme 

 tip being white in the fresh feather ; the second and third primaries 

 have only small terminal white spots. In No. 92826 on the first primary 

 the mirror is considerably larger, having, besides, united with the 

 white tip in the outer web, and leaving only a narrow bridge of gray 

 separating the apical and the subapical spot of the inner web ; the second 

 primary has, in addition to the broader white apex in the outer web, 

 a longitudinal oblong mirror, to which corresponds a larger but not 

 15861 BuU. 29 5 . 



