B.\NG'S AND CERRALVO BLACK-THROATED SPARROW 1001 



Distribution 



Range. — California, Nevada and Wyoming to Baja California and 

 Sonora. 



Breeding range. — The desert black-throated sparrow breeds from 

 northeastern California (Alturas), northern Nevada (Virgin Valley in 

 Humboldt County, WeUs), northern Utah (Salt Lake City), south- 

 western Wyoming (Rock Creek, Big Canyon), and western Colorado 

 (Little Snake River, Cortez) south through desert areas to central 

 Baja Cahfornia (south to lat. 27°N.; Cedros, Natividad, and Angel de 

 la Guarda Islands), northern Sonora (south to lat. 30°N.), and north- 

 western Chihuahua (Casas Grandes, Samalayuca). 



Winter range. — Winters from southeastern Cahfornia (Providence 

 Mountains), southern Nevada (Lake Mead), central Arizona (Salt 

 River Valley, Safl'ord), and southwestern New Mexico south to central 

 Baja Cahfornia (San Ignacio Lagoon, San liucas) and central Sonora 

 (Guaymas). 



Casual records. — Casual in British Columbia (Wells Gray Park), 

 Oregon (Depoe Bay, Beaverton, Milwaukie; Silver Lake and Wright's 

 Point in Harney County), Idaho (Pahsimeroi Valley), and Kansas 

 (near Garden City). Photographed (subspecies not determined) in 

 Illuiois (Rockton) and New Jersey (New Brunswick) ; sight records 

 in Wisconsin, Ohio, and Massachusetts. 



Egg dates. — Ai'izona: 25 records, April 20 to August 10; 6 records, 

 April 24 to May 21. 



Cahfornia: 10 records, April 15 to June 6. 



Nevada: 15 records. May 4 to July 29. 



New Mexico: 9 records, May 20 to July 30. 



AMPHISPIZA BILINEATA BANGSI Grinnell 

 AMPHISPIZA BILINEATA BELVEDEREI Banks 



Bangs' and Cerralvo Black -throated Sparrows 

 Contributed by Richard C. Banks 



Habits 



Joseph Grinnell named the subspecies bangsi in 1927 in tribute to 

 the ornithological work of Outram Bangs. He described it as similar 

 to the form deserticola, but with a slightly shorter wing and tail, a 

 shghtly larger bill, and paler on the upper surface. Adriaan J. van 

 Rossem (1930) indicates that this is the smallest of the (then known) 

 races of the species, and claims that it is darker than deserticola, the 

 original description having been based on material which had turned 

 paler with age. 



