76 BULLETIN 17 9, UNITED STATES NATIONAL MUSEUM 



Breeding range. — Cassin's kingbird breeds north to central Cali- 

 fornia (Redwood City and probably Tracy) ; northern Utah (Salt 

 Lake Coimty) ; and northern Colorado (probably Ault). East to 

 eastern Colorado (probably Ault, Agate, and Beiilah) ; western Okla- 

 homa (Kenton) ; eastern New Mexico (Montoya and Eoswell) ; west- 

 ern Texas (Fort Davis and Alpine) ; western Tamaulipas (Miqui- 

 huana) ; and Guerrero (Chilpancingo). South to Guerrero (Chil- 

 pancingo) ; Jalisco (Ocotlan) ; southwestern Durango (Salto) ; and 

 northern Baja California (Aguaita). West to northwestern Baja 

 California (Aguaita and San Quintin) ; and north along the coast 

 of California to Redwood City. 



Winter range. — During the winter months these birds are found 

 north to southern California (Santa Barbara and Salton Sea) ; south- 

 ern Arizona (Nogales) ; and Chihuahua (Colonia Garcia and Chi- 

 huahua City) ; and south through Mexico (chiefly the western part), 

 to Guatemala (Salama and Duenas). 



Spring migration. — Early dates of spring arrival are: New 

 Mexico — State College, April 13. Colorado — Pueblo, xVpril 29. 

 Arizona — Tucson, March 24. Utah — Salt Lake City, May 11. Cen- 

 tral California — Paicines, March 7. 



Fall migration. — Late dates of fall departure are: Central Cali- 

 fornia — San Francisco, October 22. Arizona — Tombstone, November 

 1; Tucson, November 10. Colorado — Beulah, September 5. New 

 Mexico — Mesilla, October 12. 



Casual records. — In common with many other flycatchers, Cassin's 

 kingbird has been taken or observed on several occasions at points 

 outside its normal range. Records in southeastern Wyoming (Doug- 

 las, Laramie Peak, Laramie, Cheyenne, and Albany County) indicate 

 the probability of breeding in that area. In the Bull Mountains, 

 Mont., several were seen and« specimens taken on August 5 and 6, 

 1918; one was reported at Beaverton, Oreg., on May 5, 1885, and a 

 pair were recorded from the Warner Valley in that State on June 

 10, 1922. 



Egg dates. — Arizona: 21 records. May 3 to August 1; 11 records. 

 May 28 to June 22, indicating the height of the season. 



California : 72 records, April 22 to June 29 ; 36 records, May 11 to 

 June 2. 



Lower California : 8 records, May 13 to June 18. 



New Mexico : 8 records. May 4 to June 29. 



MUSCIVORA TYRANNUS (Linnaeus) 



FORK-TAILED FLYCATCHER 



HABITS 



This long-tailed, conspicuously black and white flycatcher, a straggler 

 from its range in Mexico and South America, has been recorded north 



