906 
Verz. Samml. Europ. Vogel, 1866, p. 14. 
(See Ridgway, Man. N. A. Birds, 1887, p. 
109.) 
No. 747 quater, p. 890. Add. Sula gossi. 
BuurE-FooTtED Boosy. Head, neck, and 
lower parts white, the head and neck streaked 
with dark gray; back and scapulars dusky 
brown, the feathers tipped with whitish; 
feet bright blue; bill and bare parts about it 
dull bluish; iris yellow. Sexes similar. 
Length 32.00-34.50; extent 62.00-66.00; 
wing 15.50-16.75; tail 8.75-9.75 ; bill 4.20- 
4.70. Gulf of California and south to the 
Galapagos (Ridgway MSS.), Goss, Auk, 
July, 1888, p. 241. 
No. 747 quinquies, p. 890. Add: Sula 
brewsteri. BrewsTEr’s Boosy. Similar 
to S. sula; mantle ending uniform in color 
with the head and neck, the last two paler, 
especially in the male; iris dark brown with 
a narrow ring of grayish-white; claws glau- 
cous-blue. @ adult: bill bluish-horn fading 
to dirty buff after death; lores slate-blue ; 
space around eye, and gular sac, pale yellow- 
ish-green; legs and feet more yellowish ; 
head, neck, breast, and upper parts sepia- 
brown, deepening on quills and tail-feathers; 
under parts from the breast pure white. 
& adult: bill olive-blue ; lores and circum- 
ocular space indigo-blue; gular sac bluish ; 
legs, feet, and webs pea-green. Plumage as 
in the female. Length 29.50-31.50 ; extent 
55.50-59.50; wing 14.50-15.50; tail 8.00; 
tarsus 2.00; bill 4.00. Southern Pacific 
Islands, north to lower California. Goss, 
Auk, July, 1888, p. 242. 
No. 768 a, p. 741. Larus barrovianus is a 
Glaucous Gull described from Behring’s Sea 
and adjacent waters from Point Barrow to 
Japan, by Mr. Ridgway, Auk, July, 1886, p. 
330. It was admitted neither to the Union 
List of 1886, nor to the Kry of 1887; and I 
am at a loss to see upon what grounds it is 
rated as a good species in the Supplementary 
List of 1889, as Z. glaucus is well known to 
vary beyond the limits of size said to be 
distinctive of L. barrovianus. 
No. 775, p. 744. Larus cachinnans becomes 
L. vege, Stejneger, Auk, July, 1888, p. 310, 
‘after DL. argentatus var. vege of Palmén, 
SECOND APPENDIX. . 
“Bidr. Sibirisk. Vega Exp., 1887, p. 370, 
one of several conspecies of the Herring 
Gull. : 
No. 788 bis, p. 751. Add: Chroicoce- 
phalus minutus. Least Guu. This 
almost cosmopolitan. Gull and the smallest 
of its tribe, originally deScribed as Asiatic 
in 1771 by Peter S. Pallas, and well known 
to be also European and African, was as- 
cribed to North America in 1831 by Swain- 
son and Richardson (F. B.-A., II., p. 426), 
on the strength of a specimen said to have 
been procured on Sir John Franklin’s first 
expedition and identified by Sabine. In 
1862, I included it in my monograph of the 
Larine (Proc. Phila. Acad. p. 311), but 
with doubt, and its alleged occurrence has 
never been accredited. It has therefore 
been omitted from all our late works. But 
quite recently it has been found on Long 
Island: see Dutcher, Auk, April, 1888, p. 
171. The size is very small; length about 
11 inches; wing 9 or less; bill 0.90, very 
slender; tarsus 1.00, and rather shorter 
than the middle toe and claw. The mantle 
is pale pearly-blue; the primaries are sim- 
ilar, white-tipped, and not crossed with 
black; and the adult in summer has a 
black hood. 
No. 809 bis, p. 892. Diomedea exuluns.* 
This species, which I took in the Kery, orig. 
ed. 1872, removed from the Kry in 2d ed. 
1884, and replaced on new evidence in the 
3d ed. 1887, is placed by the Committee in 
the hypothetical List. See Coues, Auk, Oct. 
1885, p. 387; Ridgway, Man. N. A. Birds, 
1887, p. 51. 
No. 823 bis, p. 781. Add: Cymochorea 
macrodactyla. GUADALUPE PETREL. An 
interesting petrel, apparently new and a 
valid species, described as Oceanodroma 
leucorrhoa macrodactyla by Bryant, Bull. 
Cala. Acad. Sci., II., No. 8, 1887. It 
appears to belong to our genus, as above, 
but we have not seen any specimens. 
The locality is Guadalupe Island, Lower 
California. 
No. 887, p. 780. Cistrelata gularis becomes 
G. scalaris, Brewster, Auk, July, 1886, p. 
300. (I cannot bring myself to misspell this 
