216 CHECK-LIST OF NORTH AMERICAN BIRDS. 
a. Empidonax trailli trailli (AupuBoNn). Traill’s Flycatcher. [466.] 
Muscicapa traillit AupuBoN, Birds Amer. (folio), I, 1828, pl. 45. (Woods 
along the prairie lands of the Arkansas River.) 
RancE.— Western North America. Breeds from southern British Columbia 
and Idaho to southern California, Arizona, New Mexico, and Tamaulipas, east 
to Missouri, Illinois, and Ohio; winters in Central America south to Nicaragua 
and Colombia. 
b. Empidonax trailli alndrum Brewster. Alder Flycatcher. [466a.] 
Empidonax traillii alnorum Brewster, Auk, XII, April, 1895, 161. 
(Upton, Maine.) 
Rance.— Breeds mainly in Hudsonian and Canadian zones from central 
Alaska, northwestern Mackenzie, southern Keewatin, central Quebec, and 
Newfoundland south to east central British Columbia, eastern Montana, 
southern Minnesota, southern Ontario, New York, New Jersey, and moun- 
tains of West Virginia; winters in Central America south to Panama; casual 
in migration in South Atlantic States. 
Empidonax minimus (W. M. & S. F. Bairp). Least Flycatcher. 
[467.] 
Tyrannula minima W. M. & S. F. Barrp, Proc. Acad. Nat. Sci. Phila., I, 
1843, 284. (Carlisle, Pennsylvania.) 
Rance.— Breeds in Canadian and Transition zones from west 
central Mackenzie, southern Keewatin, Quebec, and Cape Breton 
Island south to central Montana, eastern Wyoming, central Nebraska, 
Iowa, Indiana, Pennsylvania, New Jersey, and in the Alleghenies 
to North Carolina; in migration west to eastern Colorado and central 
Texas; winters from northeastern Mexico and Yucatan to Panama 
and Peru; accidental in Grand Cayman Island, West Indies. 
Empidonax hammondi (XanTus). Hammond’s Flycatcher. [468.] 
Tyrannula hammondit Xantus, Proc. Acad. Nat. Sci. Phila., 1858, 117. 
(Fort Tejon, California.) 
RanGeE.— Breeds in Transition and Canadian zones of western 
North America from southeastern Alaska, southern Yukon, and 
central Alberta to southern California and Colorado; winters from 
northern Mexico to the highlands of Guatemala. 
