ORDER PASSERES. 187 
462 a. Contopus richardsonii peninsulze Brewsr. 
Large-billed Wood Pewee. 
Contopus richardsonii peninsule BRewst. Auk, VIII. April, 1891, 
144. 
[B—, C—, R—, C—.] 
Groc. Dist.— Sierra dela Laguna, Lower California. 
GENUS HMPIDONAX Capsanis. 
Limpidonax Cas. J. f. O. 1855, 480. Type, Zyrannula pusilla 
SWAINS. 
463. Empidonax flaviventris Bairp. 
Yellow-bellied Flycatcher. 
Lyrannula flaviventris Bairp (W. M. & S. F.), Pr. Ac. Nat. Sci. 
Phila. July, 1843, 283. 
Empidonax flaviventris BAIRD, B. N. Am. 1858, 198. 
[B 144, C 259, R'322, C.388.] 
Geoc. Dist.— Eastern North America west to the Plains, and from 
southern Labrador south through eastern Mexico to Panama, breed- 
ing from the Northern States northward. Casual in Greenland. 
464. Empidonax difficilis Barrp. 
Western Flycatcher. 
Empidonax dificilis BarrD, B, N. Am. 1858, 198 (in text). 
[B 144a, C 259, part, R 323, C 389. ] 
Geroc. Dist.— Western United States, from the Plains to the 
Pacific ; south to Cape St. Lucas and through western Mexico to 
Costa Rica ; north to southern Alaska. 
464.1. Empidonax cineritius Brewsr. 
St. Lucas Flycatcher. 
Empidonax cineritius BREwsT. Auk, V. Jan. 1888, go. 
[B wns (G aiToN) R—, (G, ral 
Geroc. Dist.— Lower California. 
