ORDER PASSERES. 293 



GENUS IRIDOPROCNE COUES. 



Iridoprocne COUES, Birds Colo. Valley, 1878, 412. Type, by orig. desig., 

 Hirundo bicolor VIEILLOT. 



Iridoprocne bicolor (VIEILLOT). Tree Swallow. [614.] 



Hirundo bicolor VIEILLOT, Ois. Amer. Sept., I, 1807 (1808), 61, pi. 31. 

 (Middle eastern United States.) 



RANGE. North America. Breeds in Canadian, Transition, and 

 Upper Austral zones from northwestern Alaska, southern and western 

 Mackenzie, southern Keewatin, and northern Ungava to southern 

 California, Colorado, Kansas, Missouri, and Virginia; winters from 

 central California, southern Texas, southern parts of the Gulf States, 

 and southeastern North Carolina (casually New Jersey) south over 

 the greater part of Mexico to Guatemala and Cuba; occasional in 

 Bermuda in migration; accidental in the British Isles. 



GENUS TACHYCINETA CABANIS. 



Tachycineta CABANIS, Mus. Hein., I, 1851, 48. Type, by subs, desig., 

 Hirundo thalassina SWAINSON (Gray, 1855). 



Tachycineta thalassina (SWAINSON). 



RANGE. Western North America south to the Mexican highlands, 

 and to Central America in winter. 



a. [Tachycineta thalassina thalassina. Extralimital.] 



b. Tachycineta thalassina lepida MEARNS. Northern Violet-green Swallow. 



[615.] 



Tachycineta lepida MEARNS, Proc. Biol. Soc. Wash., XV, March 5, 1902, 

 31. (Laguna Mountains, 20 miles north of Campos, San Diego Co., 

 California.) 



RANGE. Western North America. Breeds from central Alaska, Yukon, 

 and southern Alberta south to northern half of Lower California and northern 

 Durango, east to western South Dakota and western Nebraska; winters in 

 Mexico and south to Guatemala and Costa Rica; migrates through western 

 Texas. 



