622 BULLETIN 50, UNITED STATES NATIONAL-MUSEUM. 
Adult female.—Wing, 317-402 (374.9); tail, 123.5-168 (144.7); 
exposed culmen, 4252.5 (45.4); tarsus, 47-59.5 (52.1); middle toe, 
45-52.5 (47.6).% 
Western North America, from southern Mexico to Mackenzie; 
breeding from eastern California (Mono Lake; Eagle Lake; Clear 
Lake), Nevada (islands in Pyramid Lake; Soda Lakes, Carson 
Desert), Utah (islands in Great Salt Lake; Utah Lake) and North 
Dakota (Stump Lake; Devils Lake), to Mackenzie (Fort Anderson; 
lower Anderson River; Great Slave Lake, from Fort Resolution to 
Fort Rae); migrating to Coast of California and southward as far as 
southern Mexico (Rio de Coahuyana and Manzanillo, Colima; San 
Mateo, Oaxaca, Feb.; Alvarado, Vera Cruz); also occuring as migrant 
(regular or casual) in western Oregon (Portland), British Columbia 
(coast as far northward as Cormorant Island; Esquimault; Vancouver 
Island; Hot Springs, Alton; Okanagan Lake), Kansas (Reno County, 
Oct. 20, 1880), Texas (Galveston; Laredo, Oct. 16, 1866), Colorado 
(Middle Park, 7,000 ft. alt., April 28, 1874; Denver, Oct. 26, 1878; 
Coventry, 1905; Loveland, May 7, 1890; Larimer County, April 18, 
1894), and accidental in Hawaiian Islands. 
Larus californicus Lawrence, Ann. Lyc. Nat. Hist. N. Y., vi, 1854, 79 (San Joa- 
quin River, near Stockton, California; coll. G. N. Lawrence); in Baird, Rep. 
Pacific R. R. Surv., ix, 1858, 846: Bull. U.S. Nat. Mus., no. 4, 1876, 51 (San 
Mateo, Oaxaca, Feb.).—Barrp, Cat. N. Am. Birds, 1859, no. 663.—CoorER 
and Sucxiey, Rep. Pacific R. R. Surv., xii, pt. ii, 1860, 273 (coast of Wash- 
ington).—Covgs, Proc. Ac. Nat. Sci. Phila., 1862, 300 (monogr.); Birds North- 
west, 1874, 634 (monogr.); Check List, 2d ed., 1882, no. 777.—BLaxIsTon, 
« Hight specimens. 
Depth 
; i ones of bil) saa 
Locality. Wing. | Tail. | Post e tos a-| Tarsus “ioe. 
. men. | eal 
angle 
MALES. 
Three adult males from Mackenzie (June, July)..-..... 422.7] 161.5 53. 8 17.7 | - 60.3 54 
Two adult males from western Nevada (May, July)...| 396.5} 151.5 49 17.2 56 50.5 
One adult male from Utah (July)...........-..2---+- 410 155 46.5 17 57 50 
One adult male from Southern California (November).| 405 152 48 17 56 61 
One adult male from State of Colima, wsstern Mexico 
(ORGDER i sasscrarenesaceneintn cumreeeaemewareneutiue 381 140 44.5 15 51.5 46 
FEMALES. 
One adult female from western Nevada (May 26)...... 383 146.5 ABE Iensoteedin 49.5 46 
Four adult females from coast of Washington (August, 
DO PCOMIMGSE nde wired acacvendavauseenlecananten nar 3582) 136.4 B35 I asst scare 50. 2 46 
Three adult females from coast of California (Novem- 
er, December) sci scanamantssimnrmsieawecuueassinsaliets 394.3 | 155.3 AON 2) Ns wie: dteserase 55.5 50. 2 
