VIREONID^ — THE VIREOS. 373 



1. L. solitarius. Spurious primary exposed. Throat and orbital ring white. 



n. Spurious primary well developed, — .60 or more long, .10 broad. 



Nape and side of neck plumbeous ; upper tail-coverts olive-green. 

 Crissuni tinged with yellow, but none on side of throat, nor across 

 breast. Wing, 3.05 ; tail, 2.40 ; bill, from nostril, .27 ; tarsus, .66. Hab. 

 Eastern Province of United States, straggling westward to the Pacific 

 Coast, especially in its migration southward into Mexico, where it pene- 

 trates in winter as far as Guatemala ..... war. solitarius. 



Above continuous olive-brown ; below ochi'aceous-white, with a bufify 

 tinge across breast, and deeply olivaceous along sides. Crissum tinged 

 with yellow. Wing, 2.80 ; tail, 2.15 ; bill, 30 ; tarsus, 66. Hab. Pacific 

 Province of United States, straggling in autumn eastward into the 

 Middle Province var. ca ssini . 



Above continuous ashy-plumbeous. Beneath pure white, ashy along 

 sides, and very slightly so across breast. Wing, 3.25 ; tail, 2.50 ; bill, 

 .30 ; tarsus, .66. Hah. Middle Province of United States, south, in win- 

 ter, through Western Mexico to Colima .... var. pltimbeus. 

 h. Spurious primary very minute, — about .30 long by .04 wide. 



Nape and side of neck olive-green; upper tail-coverts plumbeous. 

 Crissum not tinged with yellow, but sides of the throat and across the 

 breast are. Wing, 3.10; tail, 2.20; bill, .29; tarsus, .64. Hab. Coban, 

 Vera Cruz, Guatemala ; resident? .... y&w 2:)ropinquus .^ 



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. 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. 



Lanivireo solitarius, Baird. 



BLUE-HEADED VIKEO. 



3Iuscicapa solitaria, Wils. Am. Orn. II, 1810, 143, pi. xvii, fig. 6. Vireo solitarius, Vieill. 

 — AuD. I. — Cassin, Sc. — Sclater, p. Z. S. 1856, 298 (Cordova) ; 1859, 363(Xalapa) ; 

 375 (Oaxaca?). — Sclater & Salvin, Ibis, 1860, 31 (Guatemala). — Cab. Jour. Ill, 

 468 (Cuba). — Gundlach, Cab. Jour. 1861, 324 (Cuba ; very rare). — Samuels, Birds 

 N. Eng. 277. Vireo {Lanivireo) sol. Baikd, Birds N. Am. 1858, 329. Vircosijlvia 

 (Lanivireo) solitarin, Baird, Rev. Am. B. 1864, 347. 



Sp. Char. (No. 300 ^.) Above olive-green, including upper tail-coverts; the top 

 and sides of head and nape ashy-plumbeous ; sides of the neck plumbeous-olive. Broad 

 line from nostrils to and around eye, involving the whole lower eyelid, Avhite. A loral line 



1 Vircosylvia propinqua, ]1\ird, Rev. 1865, p. 348. This appears to be merely a permanent 

 resident race of solitariiis, -which itself visits Guatemala only in winter. Closely resembling the 

 latter, it differs essentially in the respects pointed out above. The difference in coloration is 

 produced by a shifting, as it were, toward the head of the yellow and olive, leaving the upper 

 tail-coverts clear ash, and the lower pure wliite, and encroaching upon the ash anteriorly to the 

 crown and ear-coverts, and the wliite alongside of the throat. In the V. plumbeus these tints 

 are simply almost entirely removed, leaving clear ash and pure white, with a tinge, however, of 

 olive on the rump and of yellow on the sides. In V. cassini the tints are darkened and browned 

 by the peculiar influence of the region where found, there being neither clear ash, nor olive-green, 

 nor pure yellow or white, in the plumage. 



