NORTHERN CLIFF SWALLOW 483 



The range as outlined is for the species of which three subspecies 

 are currently recognized. The typical form, the northern cliff swal- 

 low {PetvocheVidon alhifrons alMfrons), is the race breeding in 

 Canada, on the west coast of Mexico, and in the United States south 

 to Arizona, New Mexico, and Texas; the lesser cliff swallow (P. a. 

 tachina) breeds in southern Texas and eastern Mexico ; the iMexican 

 cliff swallow {P. a. melanog aster) occupies the Mexican tableland 

 north to southern Arizona and New Mexico. 



Spring migration. — Early dates of spring arrival in the United 

 States and Canada are : Florida — Coconut Grove, March 4. Georgia — 

 Macon, April 11. District of Columbia — Washington, April 10. 

 Pennsylvania — Coatesville, April 17. New York — Geneva, April 15. 

 Connecticut — Hartford, April 17. Massachusetts — Boston, April 19. 

 Vermont — Bennington, April 13. Maine — Ellsworth, April 21. New 

 Brunswick — Grand Manan, April 14. Quebec — Montreal, April 19. 

 Kentucky — Bowling Green, April 2. Missouri — St. Louis, April 10. 

 Illinois — Chicago, April 11. Indiana — Bloomington, April 12. Ohio — 

 Columbus, April 14, Michigan — Ann Arbor, April 11. Ontario — 

 London, April 19. Iowa — Davenport, April 7. Wisconsin — Milwau- 

 kee, April 7. Minnesota — Minneapolis, April 13. Manitoba — Aweme, 

 April 28. Texas — Kerrville, April 4. Kansas — Manhattan, April 13. 

 Nebraska— Red Cloud, April 23. South Dakota— Yankton, April 21. 

 North Dakota — Larimore, April 30. Saskatchewan — Indian Head, 

 May 6. New Mexico — State College, April 4. Arizona — Tucson, April 

 5. Colorado — Loveland, April 24. Wyoming — '\"\nieatland, May 1. 

 Montana — Big Sandy, May 2. Alberta — Banff, ISLay 8. Mackenzie — 

 Peace River, May 20. California — Los Angeles, February 26. Ore- 

 gon — Narrows, March 11. Washington — Tacoma, April 4. British 

 Columbia — Okanagan Landing, April 19. Alaska — Nulato, May 10. 



Fall wigration. — Late dates of fall departure are: Alaska — Ram- 

 parts of Porcupine River, August 28. British Columbia — Okanagan 

 Landing, September 15. Washington — Seattle, October 9. Oregon — 

 Klamath County, September 18. California — Kernville, October 28. 

 Mackenzie — Pelican Rapid, August 24. Alberta — Banff, September 

 3. Montana — Fortine, September 8. Wyoming — Yellowstone Park, 

 September 6. Colorado — Denver, October 3. Arizona — Salt River 

 Bird Reservation, October 14. New Mexico — junction of Beaver 

 Creek and the Gila River, October 16. Saskatchewan — Eastend, Sep- 

 tember G. South Dakota — Sioux Falls, September 10. Nebraska — 

 Valentine, October 4. Kansas — Onaga, October 8. Texas — Austin, 

 October 1. Manitoba — Aweme, September 24. Minnesota — Jackson 

 County. October 8. Wisconsin — Madison, October 4. Iowa — Giard, 

 September 30. Ontario — Ottawa, September 30. Michigan — Sault 



