382 



NORTH AMKUK'AX BIRDS. 



SUUGEMS VIREO, VlElIX. 

 Vireo, ViEiLL, Ois. Am. Sept. 1, 18(»7, 83. (Ty|K*, Muscicajui novrboracnisis, Gm.) 

 Chak. \Viii<3's short and loundeU, a little longer than the tail, equal to it, or shorter 



Yirro nnrehnraetnsis. 



First primary <listinct and larire, from two fil'tlis to half or more the length of the second, 

 shorter or not longer than the eighth. 



The characters of Virco are essentially 

 those of Virco.sijlvia ; the hill, however, is 

 shorter ; the first (^11111 always present, hetter 

 developed, sometimes more than half the 

 second. The wings are shorter, and more 

 rounded ; tlie tarsi usually longer. The 



Vireo noveboracensh. SCCtioUS arC aS folloWS : 



Vireo. Wings pointed : first quill less than half the seoon*!, which is about equal 

 to seventh or eighth, and decidedly longer than the tenth primary and the secondaries. 

 Type, V. norehorarensis. 



Vireonella. Wings rounded, scarcely longer than the tail ; the first quill half as long 

 as the second for more than half), which is not longer than the tenth primary and secon- 

 daries, or even less. Bill and feet generally much sto'iter than the preceding. Type, V. 

 gnudlachi 



None of the species of Vireonella are found in the United States. 



Species. 



Common- Ciiaractkrs. All the species olivaceous or ashy above, beneath whit- 

 ish, or olivaceous-yellow. Wings with light bands. A light stripe from bill 

 over the eye, but not beyond it, except in carmioli. Iris brown, as far as known, 

 except in V. noi'eboracensis, where it is white. 

 A* Two conspicuous light bands on wing. 



a. Sexes different. Whole lore white. 



1. V. atricapillus. Above olive-green, outer edges of tail-feathers 

 • bright yellowish -green ; wing-bands greenish-white. Sides oliva- 



ceous-j ellow. ^fale. Head and neck (exce[)t lore, orbital ring, chin, 

 an<l throat) deep l>lack ; lower parts pure white medially. Female 

 with the black replaced by dull slate ; lower parts ochraceous-white 

 medially. Wing, 2..'30 ; tail, 1.80; tarsus, .G8 ; bill, from nostril, 

 .24. Hab. Southern Texas ; Mazatlan, Mexico. 



b. Sexes alike. Lore dusky, with light mark above it. 



