316 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



of bill at base, 9.1-10.2 (9.9); tarsus, 24.1-25.4 (24.9); middle toe, 15.7- 

 17.8 (IB. 3).^ 



Adidf female.— L,ength (skins), 167.0-190.5 (177); wino, 89.4-98.3 

 (93.7); tail, 69.3-79.2 (74.4); exposed culmen, 17-19.8 (18.3); depth of 

 })ill at base, 8.6-9.7 (9.1); tarsus, 23.4-25.4 (24.6); middle toe, 15.5- 

 17.8 (16.3).- 



Western United States and British provinces and plateau of Mexico; 

 north to southern British Columbia, southern Alberta, and southern 

 Assiniboia; east to eastern border of the Great Plains in middle portions 

 of South Dakota, Nebraska, Kansas (Manhattan), Indian Territory, and 

 Texas, more sparingly to eastern portion of the same States; breeding 

 south at least to States of Sonora and Chihuahua, northern Mexico; 

 in winter south to States of Colima (Manzanillo), Mexico (Tlalpam, 

 valley of Mexico), Puebla (Huchuetlan, Huachimango), and Durango 

 (Chacala, Papasquiaro). Accidental in Maine (Sorrento, Hancock 

 County, November, 1889). 



Xanthornus hullockn Swainson, PhiloH. Mag., new ser., i, 1827, 436 (tableland of 

 Mexico). 



Agelaius buUockii Eichardson, Rep. Brit. Assoc, for 1836 (1837), 176. 



IcteruH hullocUi Boxaparte, Geog. and Comp. List, 1838, 29. — Audubon, Orn. 

 Biog., V, 1839, 9, pis. 388, 433; Synopsis, 1839, 143; Birds Am., oct. ed., iv, 

 1842, 43, pi. 218.— Newberry, Rep. Pacific R. R. Surv., vi, 1857, 87 (Sacra- 

 mento Valley, California). — Baird, Rep. Pacific R. R. Surv., ix, 1858, 549; 

 Rep. U. S. and Mex. Boimd. Surv., ii, pt. 2, 1859, 20 (Guadalupe Canon and 

 Eagle Pass, Texas); Cat. N. Am. Birds, 1859, no. 416. — Xantus, Proc. Ac. 

 Nat. Sci. Phila., 1859, 192 (Fort Tejon, California).— Henry, Proc. Ac. Nat. 

 Sci. Phila., 1859, 107 (New Mexico). — Cooper and Sucklev, Rep. Pacific 

 R. R. Surv., xii, pt. ii, 1860, 209 (Puget Sound, etc.).— Sclater, Cat. Am. 

 Birds, 1862, 130 (California; n. Mexico).— Lord, Proc. Roy. Art. Inst., iv, 

 1864, 121 (British Columbia).— Coues, Proc. Ac. Nat. Sci. Phila., 1866, 91 

 (Fort Whipple, Arizona); Check List, 1873, no. 217; BirdsN. W., 1874, 195.— 

 Cooper, Orn. Cal., 1870, 273. — Baird, Brewer, and Ridgway, Hist. N. Am. 



^ Twelve specimens. 



^ Twelve specimens. 



Specimens from California are smaller than those from the interior, and apparently 

 average rather duller in coloration; average measurements of equal series from east 

 and west of the Sierra Nevada, respectively, are as follows: 



Localitv. 



MALES. 



Six adult males from Grout Basin and Rocky 



Mountain district 



Six adult male's from Ciilifornia 



I'EMAI.ES. 



Six adult females from Great Basin and Rocky 



Mountain district 



Six adult females from California 



