LARUS. 31 
than .50 of an inch wide, and 
often extending to the extreme 
tip; length 22.50-26.00, wing 
16.25-17.50 (17.24), culmen 1.95- 
2.50 (2.24), depth of bill through 
angle .68-.85 (.79), tarsus 2.30- 
2.80 (2.57), middle toe (without 
claw) 1.85-2.25 (2.10). Eggs 
2.85 2.01. Hab. Whole of 
North America, south, in win- 
ter, to Cuba and Lower Califor- 
nia; breeding from Maine, etc., 
northward...... 5la. L. argen- 
tatus smithsonianus Couvzs. 
American Herring Gull. 
*. Lower mandible with a black spot near end, 
the upper also sometimes with a black 
spot. 
Adult: Mantle deep plumbeous-gray, 
asin D. vege PAut.; bill yellow, with 
red spot near end of lower mandible, 
this enclosing, or adjacent to, a 
smaller black spot; iris deep brown, 
and feet (in life) pale pea-green or 
sage-green. Young: Above coarsely 
spotted with brownish gray and pale 
grayish buff, or dull whitish, the 
quills and tail-feathers dull blackish ; 
head, neck, and lower parts mottled 
or clouded with grayish white or 
brownish gray ; bill dusky with black 
tip. Downy young: Grayish white, 
the head with irregular black spots, 
most numerous above; upper parts 
clouded with dusky grayish. Length 
20.00-23.00, wing 15.00-16.75, culmen 
1.65-2.15, depth of bill at angle .60- 
.75, tarsus 2.00-2.60, middle toe (with- 
out claw) 1.70-1.95. Eggs 2.61 x 
1.80. Hab. Western North America, 
chiefly in the interior, from Mexico 
to Alagka......... 53. L. californicus 
Lawe. California Gull. 
g’. Depth of bill through angle contained at least four 
and a half times in the length of the tarsus. 
