290 



NORTH AMERICAN BIRDS. 



Genus OPORORNIS, Baird. 



Oporornis, Baird, Birds N. Am. 1858, 246. (Type, Sylvia agilis, Wils.) 



Gkn. Char. Bill sylvicoline. rather compressed ; distinctly notched at tip ; rictal bristles 



very much reduced. Wings elongated, point- 

 ed,- much longer than the tail; the first quill 

 nearly or quite the longest. Tail very slightly 

 rounded ; tail-feathers acuminate, pouited ; 

 the under coverts reaching to within less than 

 half an inch of their tip. Tarsi elongated, 

 longer than the head; claws large, the hinder 

 one as long as its digit, and longer than the 

 lateral toes. Above olive-green ; beneath 

 yellow ; tail and wings immaculate. Legs 

 yellow. 



Oporornis forinosus. 



This group of American Warblers is very distinct from any other. The 

 typical species is quite similar in color to Geotlilypis Philadelphia, but is at 

 once to be distinguished by much longer wings, more even tail, and larger 

 toes and claws. It is also very similar to Seiurus, differing chietiy in the 

 longer wings, larger claws, and absence of spots beneath. 



Throat and crown ash-color ; a white ring round the eye. No black on the 

 .side of the head 0. agilis. 



Throat and superciliary stripe yellow; top of the head and n streak beneath 

 the eye black 0. formosus. 



Oporornis agilis, Baird. 



CONNECTICUT WARBLEK. 



Sylvia agilis, "WiLS. Am. Oni. V, 1812, (34, pi. xxxix, fig. 4. — AuD. Orn. Biog. 11, ^\. 

 cxxxviii ; BoN. Sylvicola ag. Jard. ; AuD. Birds Am. II, pi. xcix. Trichasag. Nutt. 

 Oporornis ag. Baird, Birds N. Am. 1858, 246, pi. Ixxix, fig. 2 : Eev. 218. ? Trichas 

 tephrocotis, Nutt. Man. 2d ed. 1840, 462 (Chester Co., Penn. ; top of head pure ash). 

 — Samuels, 208. 



Sp. Char. Spring male. Upper parts and sides of the body uniform olive-green, very 

 slightly tinged with ash on the crown. Sides of the head ash, tinged with dusky beneath 

 the eye. (Entire head sometimes ash.) Chin and throat grayish-ash, gradually becoming 

 darker to the upper part of the breast, where it becomes tinged with dark ash. Sides of 

 the neck, breast, and body olive, like the back ; rest of under parts light yellow. A broad 

 continuous white ring round the eye. Wings and tail-feathers olive (especially the latter), 

 without any trace of bars or spots. Bill brown above. Feet yellow. Length, 6 inches; 

 wing, 3.00 ; tail, 2.25. Female. The olive-green reaching to the bill, and covering sides 

 of head ; throat and jugalum pale ashy-buff. Young not seen. Nesting unknown. 



Autumnal specimen nearly uniform olive above ; the throat tinged with brownish so as 

 to obscure the ash. 



Hab, Eastern Province of United States. 



