370 P-ULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



molt, adult female at all sea.sons, and young, l)rownish above, con- 

 spicuously streaked with black and bufi'y, brownish buli'y or yellowish 

 beneath. 



Range. — Eastern and central temperate North America; West 

 Indies and South America in winter. (Monotypic.) 



DOLICHONYX ORYZIVORUS (Linnaeus). 



BOBOLINK. 



Adult male in spruig.—ijenQViiX color black; hindneck ]>utl'; scapu- 

 lars, rump, and upper tail-coverts white, more or less tingt^d with gray, 

 especially the upper rump, which is sometimes uniform gray; inter- 

 scapulars more or less edged with but!', forming streaks, especially 

 along the median line; tertials and innermost greater wing-coverts 

 margined with pale yellowish passing terminally into grayish l)rown; 

 longer primaries narrowly edged with pale yellowish; inner webs of 

 rectrices more or less broadly tipped with grayish; feathers of flanks 

 and under tail-coverts more or less distinctly margined with buffy or 

 whitish; thighs with feathers on outer side more broadly margined 

 with burt'; bill black; legs and feet dusky brownish; iris brown. 



Adult male in swnnier.—S\\\\\\<iv to the spring phimage, but nape 

 white, or nearly so, and whitish or buffy margins to flank feathers and 

 under tail-coverts almost absent, from abrasion. 



Adalt female in spring. — General color above light bufly olive; 

 pileum with a broad median stripe of pale buffy olive or olive-buff, and 

 two Ijroad lateral stripes of black, the latter streaked with light buffy 

 olive; back broadly streaked with black, the edges of some of the 

 feathers light olive-buff, producing two nearly parallel narrow stripes 

 when the plumage is properly arranged; rump feathers and upper tail- 

 coverts with more or less distinct (usually mostly concealed) central 

 wedge-shaped or sagittate streaks of dusky; wings and tail dusky, with 

 conspicuous edgings of pale yellowish and light grayish olive; sides 

 of head (including a broad superciliary stripe), sides of neck, and 

 under parts light olive-buffy, more decidedly buffy or yellowish across 

 chest and along sides and flanks, paler and straw yellow or yellowish 

 white on throat and abdomen; sides, flanks, and under tail-coverts 

 broadly streaked with dusky; a narrow dusky postocular stripe; bill 

 brown, paler on mandible, darker on terminal portion of maxilla; iris 

 brown; legs and feet light ])rown (in dried skins). 



Adult female in summer. — Similar to the spring plumage, but upper 

 parts with the ground-color paler and grayer and the black streaks 

 more sharply deflned; under parts rather paler. 



Adult female in vmiter. — Similar to the spring plumage, l)ut more 

 richly colored", especially the under parts. 



Adult m<de in fall and winter. — Similar in coloration to the adult 

 female, but larger. 



