866 Eepokt of State Geologist. 



seen: Lafayette, September 6, 1896, September 21, 1893; Greensburg, 

 September 10, 1896, September 15, 1894; Bicknell, September 23, 

 1895, October 10, 1896; Brookville, September 3, 1883, October 30, 

 1880; Sedan, September 16, 1894, October 1, 1889; Warren County, 

 September 35, 1897. 



106. G-EKua BMPIDONAX Caeakis. 



a' . Below diBtinctly yellow. E. flaviventris Baird. 177 



a''. Below not distinctly yellow. 

 6'. Wing under 2.60; tail emarginated. E. minimus Baird. 181 



b'. Wing 2.75 or over; tail even or slightly rounded. 



c'. Upper parts olive green, crown about the same shade; bill pale yellow 



below. E. virescens (Vieill.). 178 



c'. Upper parts dark olive green, shaded with brownish, center of crown 



feathers brown ; bill dull brownish below. 



d'. Bill larger; wing bars less conspicuous. E. traillii (Aud.). 179 



d^. Bill smaller ; wing bars more conspicuous. 



E. traillii alnorum Brewster. 180 



*177. (463). Empidonax flaviventris Baird. 



Yellow-bellied. Flycatch.er. 



Above, olive-green, somewhat darker on the crown. Wings, dark 

 brown, crossed with two bands, and secondaries edged with yellow- 

 ish-white; tail, brown, edged with olive-green; yellow ring around eye. 

 Below, yellow, the fore parts tinged with pale olive-green; the back 

 parts, dull sulphur-yellow; bill, above, blackish; below, yellow or 

 whitish. 



Length, 5.10-5.80; wing, 3.40-3.75; tail, 3.00-3.30. 



Eange. — Eastern North America, from Panama to Labrador and 

 Northwest Territory; casually to Greenland. West to Manitoba and 

 Minnesota. Breeds from Massachusetts and Pennsylvania northward. 

 Winters south of United States. 



Nest, on ground, of moss and rootlets. Eggs, 4-5; dull white, with 

 fine markings of brown; .67 by .51. 



Dr. Coues gives the following synopsis for the identification of the 

 eggs of the small flycatchers: 



"E. acadicus — Nest, on the trees, in horizontal forks, thin, saucer- 

 shaped, open-work; eggs, creamy-white, boldly spotted. 



"E. traillii — Nest, in trees, in upright crotch, deeply cupped, com- 

 pact walled; eggs, creamy-white, boldly spotted. 



"E. minimus — Nest, in trees, in upright crotch, deeply cupped, 

 compact walled; eggs, immaculate white. 



