632 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
[Larus hybernus] a. ferroensis Bonararte, Consp. Av., li, 1857, 223. 
[Larus hybernus] b. islandicus Bonaparte, Consp. Av., ii, 1857, 223. 
Larus suckleyt (not of Lawrence) ScHLEGcEL, Mus. Pays-Bas, vi, no. 23 (Lari), 
1863, 27 (Japan). 
Larus audouini (not of Payraudeau, 1826) Tristram, Proc. Zool. Soc. Lond., 
1864, 455; Ibis, 1868, 330 (Palestine). 
(?) Larus delawarensis (not of Ord) Cougs, Proc. Ac. Nat. Sci., 1861, 246, part 
(Henley Harbor, Labrador; 1 spec.). 
LARUS BRACHYRHYNCHUS Richardson. 
SHORT-BILLED GULL. 
Similar to L. canus, but averaging slightly smaller (except tail and 
middle toe, which are longer), and bill relatively shorter and deeper; 
adults with gray ‘‘wedge” on inner web of third primary (from 
outside) always white distally, this white carried beyond tip of sixth 
(often beyond tip of fifth) primary, and black subterminal area. of 
‘longer primaries more restricted. 
Adults in. summer.—Head, neck, rump, upper tail-coverts, tail, and 
entire under parts, including axillars and under wing-coverts, im- 
maculate pure white; back, scapulars and wings uniform neutral gray 
(between pale and light—almost exactly as in LD. canus and L. cali- 
fornicus), the secondaries passing into white terminally (for about 
30-32 mm); outermost primary slate-black, the subterminal portion 
(for about 51 mm.) white, including shaft, the tip black, the inner web 
more slaty than the outer, with basal half, more or less, sometimes 
grayish white, minutely freckled with darker, but usually plain slaty 
gray, paler basally; second primary (from outside) with basal half 
of outer web and much more of inner web pale gray, then black 
(abruptly) followed by a white area, about 44-45 mm. long, then a 
black spot or band, about 17-18 mm. wide, and a small apical spot of 
white; third primary tipped with white, the subterminal portion, for 
about 25.5 mm. on mner web and 51 mm. or more on outer web, 
black, the remaining portion light gray, becoming white or nearly so 
on inner web where joining the black subtermina! area; fourth primary 
similar, but the black subterminal area more restricted, and the gray 
of outer web passing into white distally; fifth primary with the sub- 
terminal black area still smaller, forming a band about 19 mm. wide, 
the white preceding this band still more extensive; sixth primary 
with the subterminal black band siill narrower, usually less than 
13 mm. wide, seldom more, and sometimes confined to inner web; 
remaining (proximal) primaries light gray (like back, etc.), passing 
gradually but broadly into white terminally; bill greenish yellow; 
rictus and eyelids vermilion red; iris dark brown;-legs and feet 
greenish (in life), the webs yellowish. 
Adults in winter-—Similar to summer adults, but head and neck 
ee chest also) longitudinally spotted with light grayish 
rown. 
