176 CHECK-LIST OF NORTH AMERICAN BIRDS. 



Range. — South Atlantic and Gulf states from central North Carolina to 

 eastern Texas north to central Alabama, southern Illinois, and south-central 

 Arkansas. Winters in South America from Colombia to Argentina. 



Chordeiles minor howelli Oberholser. Howell's Nighthawk. [420e.] 



Chordeiles virginianus howelli Oberholser, Bull. U. S. Nat. Mus., No. 86, 

 [April 6] 1914, 57. (Lipscomb, Lipscomb Co., Texas.) 



Range. — Southern Great Plains and central Rocky Mountain regions; from 

 Wyoming to middle Texas, Colorado, Oklahoma, middle and western Kansas, 

 northeastern Utah, northeastern New Mexico, and southwestern Nebraska, 

 casually to North Dakota. Winters probably in South America and migrates 

 through Nicaragua. 



Chordeiles minor aserriensis Cherrie. Cherrie's Nighthawk. [420/.] 



Chordeiles virginianus aserriensis Cherrie, Auk, XIII, No. 2, April, 1896, 

 136. (Aserri River Valley, San Jose, Costa Rica.) 



Range. — Central-southern Texas (Cameron County to Wharton, Bexar, and 

 Edwards counties) and Tamaulipas. South in migration at least to Costa 

 Rica. 



Chordeiles minor sennetti Coues. Sennett's Nighthawk. [420c.] 



Chordiles popetue Senneitii Coues, Auk, V, No. 1, Jan., 1888, 37. (50 

 miles west of Pembina, Minn. = Pembina, North Dakota.) 



Range. — Northern portion of the Great Plains; breeds in northern North 

 Dakota, and northeastern Montana south to eastern Wyoming, northwestern 

 Iowa, and northern Nebraska. Migrates south through Oklahoma and Texas, 

 probably to South America. 



Chordeiles minor henryi Cassin. Western Nighthawk. [420a.] 



Chordeiles Henryi Cassin, Illustr. Birds Calif., Texas, etc., Pt. 8, [March 13] 

 1855, 239. (Fort Webster, New Mexico.) 



Range.^ — Southern Rocky Mountains and adjacent high plains; breeds in 

 southwestern Colorado, eastern Arizona, New Mexico, Chihuahua, and Sonora. 

 In migration east to central Oklahoma and south to Jalisco and Tamaulipas; 

 winters probably in South America. 



Chordeiles minor hesperis Grinnell. Pacific Nighthawk. [420d.] 



Chordeiles virginianus hesperis Grinnell, Condor, VII, No. 6, Nov. 22, 

 1905, 170. (Bear Lake, 6700 feet, San Bernardino Mountains, CaU- 

 fornia.) 



Range. — Breeds from southeastern British Columbia to southwestern 

 Saskatchewan, central Montana, central Utah, and northwestern Wyoming 



