95 



2. Rump and upper tail-coverts decidedly lighter colored than back. 

 White-rumped Shrike. 



621. Lanius borealis Vieillot — Northern Shrike. 



A common winter resident over entire state, appearing in middle 

 October, and remaining late into March. Rulo, Peru, Omaha, Lin- 

 coln, Beatrice, West Point, Neligh, and Cherry and Sioux counties. 



622e. Lanius ludovicianus migrans W. Palmer — Migrant Shrike. 



This recently recognized subspecies occurs regularly in eastern 

 Nebraska, but is only locally common. Breeding specimens have 

 been, taken at Omaha, Lincoln, Beatrice, and West Point, which 

 beyond doubt are referable to migrans. On these specimens all 

 former Nebraska records of the "Loggerhead" Shrike are based. 

 Other specimens intermediate between this and the following form 

 are frequent. 



622a.*Lanius ludovicianus excubitorides (Swainson) — White-rumped Shrike. 



Entire state; eastward partially replaced by preceding form, but 



the commoner form even there. Arives early in April, breeds late 



in April, in May, and in June, departs early in October. Omaha, 



Lincoln, Beatrice, West Point, Neligh, and Cherry and Sioux counties. 



Family VIREONID^— Vireos 



1. Without distinct wing-bars. . .- (2) 



1. With distinct white or whitish wing-bars (4) 



2. Under parts white (3) 



2. Under parts yellowish; first primary over one inch long; crown 

 gray with » white but no black bordering line over eye. . . . 



v Philadelphia Vireo. 



3. Yellowish on sides ; larger, first primary less than one inch long .... 



Warbling Vireo. 



3. Yellowish on sides; smaller, upper parts,' particularly crown, grayer . . 



Western Warbling Vireo. 



3. Little or no yellowish on sides; first primary much over one inch long; 

 crown slaty gray, bordered by a black and then a white band over 



the eye Red-eyed Vireo. 



4. First primary nearly as long as second; breast bright yellow; 



back bright olive-green; eye-ring yellow. .Yellow-throated Vireo. 



4. First primary shorter than second, less than one inch long, breast 



not yellow (5) 



5. Wing over 2| inches long, eye-ring white. . . (6) 



5. Wing under 2| inches long, eye-ring variable (7) 



6. Crown and sides of head bluish gray, changing to. olive-green on 



the back; below white Blue-headed Vireo. 



6. Crown and sides of head bluish gray, the back of same shade; 



below less pure white. . . ■ Plumbeous Vireo. 



7. Crown and sides of head black, changing to olive-green on the back; eye- 

 ring white Black-capped Vireo. 



7. Crown and sides of head gray or olive (8) 



