VIREONID^E — THE VIREOS. 
35 
bands on the wing; see section “6”). Superciliary stripe continued back to 
the occiput. No trace of light bands on the wing. No conspicuous ring round 
the eye. 
a. No spurious primary. Bill compressed, its tip abruptly hooked ; culmen 
and commissure straight. Crown decidedly more ashy than the back. 
Sp. flavoviridis , barbatula , olivacea , philadelphica. 
b. An acute spurious primary. Bill depressed, the tip only slightly hooked ; 
culmen slightly curved. Crown scarcely more ashy than back . . Sp. gilvus. 
Lanivireo. Bill compressed, stout ; culmen arched from the base, commis- 
sure curved. Superciliary stripe stopping at posterior angle of the eye and 
I curving under it, enclosing the eye in a conspicuous orbital ring, interrupted only 
in front. Two conspicuous white bands on the wing. 
a. No spurious primary Sp. flavifrons. 
b. With an acute spurious primary Sp. solitaria, plumbea. 
Vireo. Bill stout, scarcely compressed, sub-cylindrical. First primary not 
! spurious, or, if so, not acute. 
a . Two conspicuous light bands on wing . Sp. atricapillus , noveboracensis , huttoni. 
b. One distinct light band on wing, and this not sharply defined, the anterior 
! one being almost obsolete Sp. belli , pusillus, vicinior. 
Subgenus VIREO SYLVIA, Bon. 
\ 
Species and Varieties. 
Common Characters. All the species olive above, white or yellowish beneath. 
Cap ashy or brownish, contrasting more or less abruptly with the olive back. 
A whitish superciliary stripe extending to the nape, and a dusky one to and be- 
hind the eye. No light bands on the coverts. Inside of wings (flanks some- 
times) and crissum yellowish, otherwise usually white beneath. 
No spurious primary Series I, 
A spurious primary . Series II. 
Series I. (No spurious primary.) 
A. A dusky “moustache” or cheek stripe along each side of the throat, 
a. No distinct dusky line along side of the crown. 
1. V. calidris. Eyes red ? Light stripes of the head dingy grayish- 
white ; crown distinctly ashy ; back grayish-olive ; crissum and lining 
of the wing scarcely yellow. Length, 5.50. Wing, 3.20 ; tail, 2.35 ; bill, 
.42. Hab. Cuba, Bahamas, and South Florida. {Florida Vireo.) 
var. b arbatula. 
B. No “ moustache.” 
a. A dusky line along each side of crown. 
2. V. olivaceus. Grayish olive-green above ; beneath white, tinged 
laterally with dull olive ; crissum and lining of wing scarcely yellow ; 
inner edges of quills white. Eyes red. Length, 5.75. Wing, 3.30 ; 
bill, .38. Hab. Eastern Province of North America, south to Northern 
South America. ( Red-eyed Vireo.) 
3. V. flavoviridis. Yellowish olive-green above; beneath white medi- 
ally, bright greenish olive-yellow laterally ; crissum, lining of wings, and 
inner edges of quills, light yellow. Eyes yellow. Length, 6.00. Wing, 
3.15 ; bill, .41, Hab. Middle America north of Panama. {Yellow-green 
Vireo.) 
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