1126 U.S. NATIONAL MUSEUM BULLETIN 237 part 2 



Texas (Palo Duro Canyon, Chisos Mountains) ; rarely to southern 

 California (San Diego, Los Angeles and San Bernardino counties) . 



Casual records. — Casual north to eastern Montana (Glendive) and 

 east to south central Nebraska (Red Cloud), central Oklahoma 

 (Norman), Arkansas (Little Rock), and Louisiana (Shreveport). 



Migration. — The data deal with the species as a whole. Early 

 dates of spring arrival are: Utah — Moab, April 2. Wyoming — Lara- 

 mie, March 23 (average of 8 years, April 12). 



Late dates of spring departure are: Nebraska — Red Cloud, April 

 18. Texas' — El Paso, April 25. Oklahoma — Cimarron County, 

 April 20. New Mexico — southern New Mexico, April 18. 



Early dates of fall arrival are: Cahfornia — Deep Springs, Septem- 

 ber 20. Arizona — ^Hualpai Mountains, September 27. New Mex- 

 ico' — Manzano Mountains, October 8. Oklahoma — Cimarron County, 

 October 20. Texas — El Paso, September 13. 



Late dates of fall departure are: Wyoming — ^Laramie, November 7 

 (average of 6 years, October 13). Utah — Roundy Reservoir, Oc- 

 tober 25. 



Egg dates. — Colorado: 45 records. May 8 to July 18; 24 records, 

 June 16 to July 4. 



New Mexico: 3 records, July 15 to August 7. 



Utah: 5 records, June 18 to July 19. 



Red-backed Gray-headed Junco (J. c. dorsalis) 



Range. — Arizona, New Mexico, and western Texas. 



Breeding range. — The red-backed gray-headed junco breeds from 

 north central Arizona (south rim of the Grand Canyon) and central 

 New Mexico (Magdalena Mountains) south to east central Arizona 

 (Sierra Ancha, Hannagan Meadow), southern New Mexico (head of 

 Mimbres River, Guadalupe Mountains), and extreme western Texas 

 (Guadalupe Mountains). 



Winter range. — Winters on or near the breeding grounds (north to 

 the Grand Canyon), south in small numbers to southern Arizona 

 (Pajaritos, Huachuca, and Chiricahua Mountains), extreme south- 

 western New Mexico (Big Hatchet Mountains), and southwestern 

 Texas (Chisos Mountains). 



Egg dates. — New Mexico: 3 records, July 15 to August 7. 



