232 BULLETIN 17 6, UNITED STATES NATIONAL MUSEUM 



(Chapada) ; western Ecuador (Portoviejo) ; and western Colombia 

 (Boc;ota and Antioquia). 



The outline presented is for the entire species, which has, how- 

 ever, been separated into seven subspecies, or geographic races. The 

 typical eastern nighthaw^k {C. m. minor) breeds in the eastern part 

 of the continent west to the edge of the Great Plains from Oklahoma 

 to Minnesota and in Canada to British Columbia and southern 

 Yukon; the Florida nighthawk (C. m. chapmani) nests in the Gulf 

 and South Atlantic States north to Arkansas, southern Illinois, cen- 

 tral Alabama, and central North Carolina and west to eastern 

 Texas; Howell's nighthawk (C. m. hmvelli) breeds in the southern 

 part of the Great Plains region from northeastern Utah and western 

 Kansas south to Oklahoma, central Texas, and New Mexico; Cher- 

 rie's nighthawk {C. m. asernensis) is found in south-central Texas 

 and the Mexican state of Tamaulipas; Sennett's nighthawk {0. m. 

 sennetti) occupies a breeding range in the northern Great Plains 

 from northeastern Montana and North Dakota south to eastern 

 Wyoming, Nebraska, and northwestern Iowa ; the western nighthawk 

 {G. m. henry i) breeds in southwestern Colorado, eastern Arizona, 

 New Mexico, Chihuahua, and Sonora; and the Pacific nighthawk 

 (C. in. hesperis) nests in the western part of the continent from\ 

 southeastern British Columbia and California east to southwestern 

 Saskatchewan, northwestern Wyoming, and central Utah. In no 

 case is it passible to indicate subspecific winter ranges, but it appears 

 that all forms winter together in South America. 



Spring migration. — Early dates of spring arrival in North Amer- 

 ica are: Florida — Orlando, March 20; Palma Sola, March 29; Pen- 

 sacola, April 8. Georgia — Savannah, April 1; Kirkwood, April 19. 

 South Carolina — Frogmore, April 12; Columbia, April 17. North 

 Carolina — Hendersonville, April 13; Raleigh, April 15. Virginia — 

 Variety Mills, April 10 ; New Market, April 24. District of Colum- 

 bia — Washington, April 18. Maryland — Mardela Springs, April 19. 

 Pennsylvania — Philadelphia, April 23 ; Beaver, April 27. New Jer 

 sey — Morristown, May 7. New York — New York City, April 20; 

 Ballston Spa, April 29; Rochester, ISIay 7. Connecticut — Hartford, 

 April 24; Jewett City, May 6. Massachusetts — Harvard, April 19; 

 Amherst, May 10. Vermont — St. Johnsbury, May 6; Rutland, May 

 12. New Hampshire — South Manchester, May 2; Concord, May 14. 

 Maine — Dover-Foxcroft, April 29; South Portland, May 1. New 

 Brunswick — St. Johns, May 13. Quebec — Quebec City, May 4; 

 Montreal, May 9. Louisiana — New Orleans, April 8. Mississippi — 

 Biloxi, April 8 ; Rodney, April 19. Arkansas — Monticello, April 11. 

 Tennessee — Athens, April 20. Kentucky — Lexington, April 19; 



