TYEAMNIDJE- TYRANT FLYCATCHERS. 853 



The following species occur, more or less abundantly, throughout 

 the State : 



A. Tail emarginated. 



1. E. flaviventris. Above olive-green, beneath light greenish yellow, shaded with 

 olive across the breast. Wing, 2. 45-2. 75; tail. 2.30-2. 55. 



2. E. minimus. Above olive-gray, beneath whitish, slightly shaded with gray across 

 the breast. Wing-bands grayish white. Wing. 2. 25-2. 65; tail,2. 25-2. 50; bill, from 

 nostril, .28-. 30; width at base, .22-. 25. 



B. Tail even or slightly rounded. 



3. E. pusillus traillii. Above brownish olive, or grayish olive-brown, beneath white, 

 the sides of the breast strongly shaded with the color of the back, the flanks and 

 crissum tinged with sulphur-yellow. Wing-bands dull grayish, or brownish gray. 

 Wing, 2.60-2.90; tail, 2.45-2.75. 



4. E. acadieus. Above grayish green, or greenish gray, beneath white, shaded with 

 olive on sides of breast. Wing-bands buff y white, or pale buff. Young trans- 

 versely mottled above. Wing, 2.80-3.15; tail, 2.50-2.85. 



Empidonax flaviventris Baird. 



YELLOW BELLIED FLYCATCHER. 



Tyrannula flaviventris WM. M. & S. F. BAIRD, Pr. Phil. Ac. i, 1843, 283. 

 Muscicapa flaviventris AUD. B. Am. vii, 1844, 341, pi. 490. 

 Empidonax flaviventris BAIED, B. N. Am. 1858, 198; Cat. N. Am. B. 1859, No. 144. COUES 



Key, 1872, 175; Check List, 1874, No. 259; 2d ed. 1882, No. 388; B. N. W. 1874, 255. -B. B. 



& R. Hist. N. Am. B. ii, 1874, 378, pi. 44, fig. 12. RIDGW. Norn. N. Am. B. 1881, No. 322. 



HAB. Eastern North America, breeding from northern border of United States 

 northward (for an undetermined distance) ; in winter, eastern Mexico, and south to 

 Colombia. Accidental in Greenland. (Replaced in western United States by an allied, 

 but apparently distinct species, the E. difficilis BAIED.) 



"Sp. CHAK. Second, third and fourth quills nearly equal; first intermediate between 

 fifth and sixth. Tail nearly even, slightly rounded. Tarsi long. Above bright olive- 

 green (back very similar to that of Vireo noveboracensis); crown rather darker. A 

 broad yellow ring around the eye. The sides of the head, neck, breast and body, and a 

 band across the breast, like the back, but lighter; the rest of the lower parts bright 

 greenish sulphur-yellow; no white or ashy anywhere on the body. Quills dark brown; 

 two bands on the wing formed by the tips of the middle and secondary coverts, the outer 

 edge of the first primary and of the secondaries and tertials pale yellow, or greenish yel- 

 low. The tail-feathers brown, with the exterior edges like the back. The bill dark 

 brown above, yellow beneath. The feet black. In the aTitumn the colors are purer, the 

 yellow is deeper, and the markings on the wings of an ochrey tint. Length, 5.15; wing, 

 2.83; tail, 2.45." (Hist. N. Am. B.) 



"First plumage: male. Above uniform yellowish olive. Beneath dull yellow, with a 

 brownish cast, tinged strongly with olive upon the throat, breast and sides. Wing- 

 bands brownish yellow. Altogether very similar to the adult. From a specimen in my 

 collection shot at Upton, Me, August 4, 174." (BKEWSTEK, Bull. Nutt. Orn. Club, Oct. 

 1876, p. 178.) 



23 



