36 
NORTH AMERICAN BIRDS. 
No dusky line on side of crown. 
5. V. philadelpliicus. Above grayish-green ; crown ashy. Beneath 
light yellow, deepest on the jugulum, whitish on belly. Eyes ? Length, 
5.00. Wing, 2.70 ; bill, .27. Hab. 
Eastern Province of North Ameri- 
(. Philadelphia Vireo.) 
Series II. {A spurious primary.) 
C. No dusky line along side of crown. No “ moustache.” 
6. V. gilvus. Eyes hazel (in all?). Crown nearly like the back. 
Length, about 5.25. 
Above olive-gray, rump more virescent ; crown more ashy. Be- 
neath dingy whitish, with a strong tinge of dingy buff from bill 
along sides and across breast. Bill, .14 deep, .30 long ; wing, 2.85 ; 
i tail, 2.05. Hob. Eastern Province of United States. ( Warbling 
Vireo.) var. gilvu. 
Similar, but above more grayish, and beneath with the buff tinge 
almost absent. Bill, .11 deep, and .22 long ; wing, 2.80 ; tail, 2.15. 
Hob. Western Province of United States. ( Swainson’s Vireo.) 
: A 
MS 
var. sw ainsoni. 
Subgenus LANIVIREO, Baird. (Page 35.) 
Species and Varieties. 
Common Characters. A broad stripe from bill to and around, but not beyond, 
the eye. Two broad white bands across the wings. Bill plumbeous-blue, black 
toward culmen. Iris brown in all species ? 
1. L. solitarius. Spurious primary exposed. Throat and orbital ring 
white. Spurious primary well developed, — .60 or more long, .10 broad. 
Nape and side of neck plumbeous; upper tail-coverts olive-green. 
Crissum tinged with yellow, but none on side of throat, nor across 
breast. Length, 5.40. Wing, 3.05 ; tail, 2.40 ; bill, from nostril, .27 ; - 
tarsus, .66. Hah. Eastern Province of United States, straggling west- 
ward to the Pacific Coast, especially in its migration southward into 
Mexico, where it penetrates in winter as far as Guatemala. ( Solitary 
Vireo.) var. solitarius . 
Above continuous olive-brown ; below ochraceous-white, with a buffy 
tinge across breast, and deeply olivaceous along sides. Crissum tinged 
with yellow. Length, about 5.30. Wing, 2.80; tail, 2.15; bill, .30; 
tarsus, .66. Hab. Pacific Province of United States, straggling in au- 
tumn eastward into the Middle Province. ( Cassinis Vireo.) var. cassini . 
Above continuous ashy-plumbeous. Beneath pure white, ashy along 
sides, and very slightly so across breast. Length, 5.75. Wing, 3.25; 
tail, 2.50 ; bill, .30 ; tarsus, .66. Hab. Middle Province of United States, 
south, in winter, through Western Mexico to Colima. (. Lead-colored 
Vireo.) var. plumbeus. 
2. L. flavifrons. Spurious primary concealed. Throat and orbital ring 
yellow. 
Anterior half of body olive-green above, lemon-yellow below ; pos- 
terior half plumbeous-ash above, white below. Length, 5.80. Wing, 
3.00 ; tail, 1.90 ; bill, .32 ; tarsus, .70. Hab. Eastern Province of 
United States, south, in winter, to Costa Rica, and very rare in Cuba. 
( Yellow-throated Vireo.) 
