ORDER PASSERES. 293 



Genus IRIDOPROCNE Coues. 



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

 Hirundo bicolor Vieillot. 



Iridopr6cne 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.] 



6. Tachycineta thalassina l€pida Mbabns. Northern Violet-green Swallow. 

 [615.] 

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

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

 California.) 



Eanqb. — 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. 



