1246 U.S. NATIONAL MUSEUM BULLETIN 237 part 2 



cowbird [Molothrus ater obscurus]. In the files of the U.S. Fish and 

 Wildlife Service there is a record by Stokeley Ligon reporting a 

 parasitized nest which was found 18 miles above Santa Kosa, New 

 Mexico, on July 6, 1913." The other record is of two parasitized 

 nests collected by Hanna in San Bernardino County, Calif. 



Distribution 



Range. — Eastern California and southwestern Utah south to 

 southeastern Sonora and western Texas. 



Breeding range. — The Arizona black-chinned sparrow breeds east 

 of the Sierra Nevada in central eastern California (east slope of 

 southern Sierra Nevada; White Mountains south to Providence 

 Mountains), southern Nevada (Grapevine, Charleston and Sheep 

 mountains), southwestern Utah (Beaverdam Mountains, Leeds), 

 northwestern, central and southeastern Arizona (Hualpai Mountains, 

 Prescott, Chiricahua and Mule mountains), southern New Mexico 

 (Cuchillo, Sierra Capitan), and western Texas (Chisos and Guadalupe 

 mountains) . 



Winter range. — Winter range poorly known, but includes southern 

 Arizona (Ajo and Santa Catalina mountains, Natanes Plateau), 

 northern Sonora (Sierra Carrizal, Sierra de San Antonio) and western 

 Texas. 



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

 of spring arrival are: Arizona — Baboquivari, March 24; Huachuca 

 Mountains, April 4. Utah — Washington County, AprU 8. Cali- 

 fornia — Monrovia, March 31; Pasadena, AprU 6; Mt. Diablo, AprU 16. 



Late date of spring departm-e is: Arizona — Sahuaro Lake on Salt 

 River, April 28. 



Egg dates. — California: 91 records, April 23 to July 7; 46 records, 

 May 11 to June 6. 



SPIZELLA ATROGULARIS CANA Coues 



California Black -chinned Sparrow 



PLATE 67 

 Contributed by John D. Newman 



Habits 



Miller, Friedmann, Griscom, and Moore (1957) give the range of 

 this subspecies: "Breeds in inner coastal mountains (Monterey 

 County southward) and on west slopes of southern Sierra Nevada of 

 central and southern California, extending south to northern Baja 

 California. Winters from coastal southern California (rarely) south 

 through Baja California to Cape San Lucas." 



