298 BARTRAM'S VIREO. 



I have not been able to ascertain if it breeds twice in the season, al- 

 though I suspect it does. 



There is a greater difference as to colour between the sexes of this 

 species than between those of the Red-eyed. The female is generally 

 much less pure in its tints, while the males have usually much more of 

 a yellowish tint on their upper and under plumage than is observed in 

 the same sex of the other species. 



ViREO Bartramii Swains. Bartram's Gheenlet, Richards, and. Swains. Fauna 

 Boreali-Americana, vol. ii. p. 235. 



Adult Male. Plate CCCCXXXIV. Fig 4. 



Bill of moderate length, strong, rather broader than high at the 

 base, compressed toward the end ; upper mandible with the dorsal line 

 descending and slightly convex, the tip very narrow, acute, declinate, 

 the ridge very narrow, the sides a little convex, the edges sharp, over- 

 lapping, with a slight notch close to the tip ; lower mandible with the 

 angle of moderate length and rather narrowed, the dorsal line ascend- 

 ing and slightly convex, the back narrow, the sides convex, the edges 

 inclinate, the tip acute and ascending. Nostrils basal, oblong, opercu- 



late. 



Head rather large, ovate ; neck short ; body rather stout. Feet of 

 ordinary length ; tarsus compressed, with seven anterior broad scutel- 

 la, edged behind ; toes slender ; the first strong, the second much shorter 

 than the fourth ; claws rather stout, much curved, compressed, lateral- 

 ly grooved, acute. 



Plumage soft and blended. Wings of moderate length, the first 

 quill a twelfth and a half shorter than the fifth, three-twelfths shorter 

 than the second, which is equal to the third, and exceeds the fourth only 

 by a quarter of a twelfth. Tail rather long, nearly even, the lateral and 

 middle feathers equal, and one-twelfth shorter than the longest. 



Bill brown above, pale bluish-grey beneath. Feet bluish-grey. The 

 general colour of the plumage above is light yellowish-olive, the crown 

 of the head deep grey, bordered on each side by a line of blackish, be- 

 low which is a line of yellowish- white passing from the nostril over the 

 eye, the loral space dusky. Quills brown, yellowish- olive on the outer 

 margin, whitish on the inner. Tail wood-brown, margined with paler. 

 The lower parts are white, the breast tinged with pale yellow, the 

 throat and sides with grey. 



Length to end of tail 4| inches ; extent of wings 7| ; bill along the 



