276 BULLETIN 19 7, UNITED STATES NATIONAL MUSEUM 



DISTRIBUTION' 



Range. — Soutliwestern United States, Lower California, and the 

 western coast of Mexico. 



Breeding range. — The gray vireo breeds north to southern Cali- 

 fornia (Saiigus and Walker Pass, possibly) ; southern Nevada 

 (Grapevine Mountains and probably Oak Spring) ; southwestern 

 Utah (Beaverdam Mountains and has occurred north to Salina) ; 

 northeastern Arizona (Keams Canyon) ; is casual or accidental at 

 Lamar, Colorado ; and extreme western Oklahoma (Kenton) . East to 

 western Oklahoma (Kenton) ; east-central New Mexico (Pajarito 

 Creek near Montoya) ; and western Texas (Guadalupe Mountains near 

 Frijole). South to western Texas (Frijole) ; southwestern New Mex- 

 ico (Apache and Silver City) ; southern Arizona (Tombstone and 

 Santa Catalina Mountains) ; and northern Lower California (San 

 Rafael Valley). West to northern Lower California (San Rafael 

 Valley) and southern California (Campo, San Jacinto Mountains, 

 Riverside, and Saugus) . 



^YinteT range. — In winter the gray vireo is as yet known only from 

 the coast of Sonora (San Esteban and Tiburon Islands to Guaymas) 

 and the Cape region of Lower California. There is also a specimen, 

 accidental or in migration, from Irde, Durango, taken on August 13, 

 1898. 



Migration. — In Sonora the extreme dates of occurrence are Septem- 

 ber 15 to April. 



Dates of spring arrival are: Texas — Frijole, April 30. Arizona — 

 Santa Catalina Mountains, April 1. California — Mecca, March 26. 



Dates of fall departure are: California — San Jacinto Mountains, 

 August 27. Utah — Salina, August 22. Arizona — Grand Canyon, 

 September 14. 



Egg dates. — Arizona : 7 records, May 20 to June 6. 



California : 12 records, April 20 to July 4 ; 6 records, May 21 to 29, 

 indicating the height of the season. 



VIREO FLAVIFRONS Vieillot 



YELLOW-THROATED VIREO 



HABITS 



This handsome vireo, the most brilliantly colored of the family, is 

 widely distributed over the eastern half of the United States and 

 southern Canada, but it is not equally common everywhere throughout 

 this wide range, and it is uncommon or rare in many places. When I 

 was a boy it was a conmion bird in southeastern Massachusetts, and 

 we often saw its beautiful nests in our shade trees and orchards: but 



