348 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Aihilt wrde.—ljQngth. (skins), 218.4-256.5 (242.3); wing, 136.1-146.5 

 (141.2); tail, 93-108.5 (102.6); culmen, from base, 21.1-25.1 (22.9); 

 depth of bill at base, 11.9-13.2 (12.4); tarsus, 33.3-37.1 (35.8); middle 

 toe, 23.4-26.2 (24.6).^ 



Adult female.— h&ngth. (skins), 190.5-210.8 (204.7); wing, 110-117.9 

 (113.8); tail, 78.7-87.6 (81.8); culmen, from base, 19.6-21.1 (20.3); 

 depth of bill at base, 9.9-10.7 (10.4); tarsus, 29.7-31.5 (30.5); middle 

 toe, 20.3-22.1 (21.1).' 



More open districts of western and central North America; north 

 to southern British Columbia, Assiniboia, Athabasca, Keewatln (to 

 about 58° 30'), and Manitoba; breeding east to the prairie sloughs of 

 the upper Mississippi Valley, as far as northeastern Illinois (Cook and 

 Lake counties), northwestern Indiana (Lake County), southwestern 

 Michigan (?), southern Wisconsin, etc.; breeding southward to Ari- 

 zona, New Mexico, and northern Tamaulipas (Matamoras), probably 

 to northern Mexico in general; in winter southward over the greater 

 part of Mexico, as far as States of Sinaloa (Culiacan, Mazatlan, Pre- 

 sidio), Jalisco (Lake Chapala, Mesquitic), Mexico (Valley of Mexico), 

 Tlaxcala (Laguna del Rosario), and Puebla (Chietla, Huehuetlan, San 

 Martin Texmelucan). Accidental straggler to Ontario (Toronto, 

 several records), Quebec (Godbout), Maine (Spruce Head), Massachu- 

 setts (Watertown), Connecticut (Hartford), Pennsylvania (Allegheny 

 County, Meadville), West Virginia (Upshur County), Maryland (Anne 

 Arundel County), District of Columbia, South Carolina (Chester 

 County), Florida, Cuba, and even to Greenland (Nenortalik, Septem- 

 ber 2, 1820). 



Icterus xanthocephalus Bonaparte, Journ. Ac. Nat. Sci. Phila., v, 1826, 223 (western 

 North America, also South America) ; Ann. Lye. N. Y., ii, 1828, 52. — Audubon, 

 Orn. Biog., v, 1839, 6, pi. 388. 



' Eleven specimens. 



^ Seven specimens. 



Specimens from the Mississippi Valley have, as a rule, the head, neck, and cheat 

 paler yellow (never orange?) than those from west of the Rocky Mountains, thongh 

 the series examined is much too small to show whether the difference is constant or 

 not. Measurements of the two series compare as follows: 



