in Various Species of North American Birds. 177 
upper parts brownish-olive, shading into reddish-olive on the rump. 
Wing-bands and tips of rectrices ferruginous ; secondaries edged with 
yellowish-olive. Throat, breast, and sides olivaceous-drab, darkest on 
sides of breast. Abdominal and anal regions soiled white, with a yellow- 
ish tinge. From a specimen in my collection taken at Cambridge, Mass., 
July 13, 1874. 
84. Contopus borealis. 
First plumage : male. Above olivaceous-plumbeous, darkest upon the 
crown ; wing-bands ferruginous ; secondaries edged with pale fulvous. 
Sides of throat, breast, and body dark plumbeous, with a brownish tinge ; 
central line from base of bill to crissum — partly interrupted upon the 
breast by the encroachment of the darker color of the sides — strong 
creamy-buff. Lower mandible black, with a limited area of brownish- 
orange at the base. From a specimen in my collection shot at Rye 
Beach, 1ST. H,, July 24, 1872. Autumnal specimens in my collection 
have the lower mandible black, the under parts much more strongly 
tinged with yellow than the adult, and the wing-coverts faintly tipped 
with ferruginous. 
85. Contopus virens. 
First plumage : male. Above olive, with a brownish cast, the feathers 
of the crowrn and interscapular region with a faint edging of pale fulvous, 
those upon the nape having a much broader one of dull ash, producing a 
well-defined band or collar. Wing-bands light reddish-brown. Beneath, 
with sides of throat, breast, and body, light olivaceous-ash ; rest of under 
parts pale sulphur-yellow. From a specimen in my collection taken at 
Upton, Me., August 8, 1874. The young in autumnal plumage differ 
from adults in having the wing-bands pale fulvous, the under parts of a 
slightly deeper yellow. 
86. Empidonax acadicus. 
First plumage. Above nearly pure olive, with indistinct narrow trans- 
verse bands of darker. Wing-bands pale reddish-brown. Under parts 
soiled yellowish- white, with an olivaceous cast on the sides of the breast. 
From a specimen in my collection shot by Dr. J. M. Wheaton, at Colum- 
bus, Ohio, June, 1876. 
87. Empidonax pusillus trailli. 
First plumage : male. Above olive-brown, the feathers of the crown 
with darker centres. Wing-bands light reddish-brown. Throat, breast, 
and sides ashy, tinged with olive upon the breast and sides. Abdomen, 
anal region, and crissum pale sulphur-yellow. Distinguishable from E. 
acadicus in first plumage by the darker color of the upper parts, especially 
of the crown, and by the entire absence of the narrow transverse bands 
upon the back. From a specimen in my collection shot at Upton, Me., 
July 21, 1874. 
