LITERATURE CITED 1773 



Shepardson, Durno Ira 



1915. The house finch as a parasite. Condor, vol. 17, pp. 100-101. 



1917. Notes from the southern Sierras. Condor, vol. 19, pp. 168-169. 

 Sheppard, Jay M. 



1959. Sprague's pipit and Smith's longspur in Ohio. Auk, vol. 76, pp. 

 362-363. 

 Sherwood, William E. 



1929. Immature song sparrow in full song. Condor, vol. 31, p. 181. 

 Shortt, Terence Michael 



1951. On the juvenal plumage of North American pipits. Auk, vol. 68, 



p. 265. 

 Shotwell, R. L. 



1930. A study of the lesser migratory grasshopper. U.S. Dep. Agric. Tech. 



Bull. 190, p. 27. 

 Sibley, Charles 



1939. Fossil fringillids from Rancho La Brea. Condor, vol. 41, pp. 126-127. 



1950. Species formation in the red-eyed towhees of Mexico. Univ. Cali- 

 fornia Publ. Zool., vol. 50, pp. 109-194. 



1952. The birds of the south San Francisco Bay region, 44 pp. (mimeo.). 



1955. The generic allocation of the green-tailed towhee. Auk, vol. 72, 



pp. 420-423. 



1956. A white-throated golden-crowned sparrow. Condor, vol. 58, pp. 



294-295. 

 Sibley, Charles G., and Pettingill, Olin Sewall, Jr. 



1955. A hybrid longspur from Saskatchewan. Auk, vol. 72, pp. 423-425. 

 Sibley, Charles G., and Short, Lester L., Jr. 



1959. Hybridization in the buntings (Passerina) of the Great Plains. Auk, 

 vol. 76, pp. 443-463. 



SlLLOWAY, PERLEY MlLTON 



1902. Notes of McCown's longspur in Montana. Osprey, vol. 6, pp. 42-44. 



1903. Birds of Fergus County, Montana. Fergus County Free High 



School, Bull. No. 1. 



1904. The song of the dickcissel. Wilson Bull., vol. 16, pp. 52-54. 

 1907. Stray notes from the Flathead Woods. Condor, vol. 9, pp. 53-54. 

 1923. Relation of summer birds to the western Adirondack forest. Roose- 

 velt WUd Life Bull., vol. I, No. 4, pp. 397-486. 



Simmons, George Finlay 



1914. Notes on the Louisiana clapper rail (Rallus crepitans saturatus) in 



Texas. Auk, vol. 31, pp. 363-384. 



1915. On the nesting of certain birds in Texas. Auk, vol. 32, pp. 317-331. 

 1925. Birds of the Austin region. 



Simpson, Roger 



1925. Photographing the rufous-crowned sparrow. Condor, vol. 27, pp. 

 97-98. 

 Skinner, M. P. 



1920. The pink-sided junco. Condor, vol. 22, pp. 165-168. 



1925. The birds of the Yellowstone National Park. Roosevelt Wild Life 

 Bull., vol. 3, pp. 7-192. 



1928a. A guide to the winter birds of the North Carolina sandhills. 



1928b. Yellowstone's winter birds. Condor, vol. 30, pp. 237-242. 



1930. House finches eating watermelon. Condor, vol. 32, p. 301. 

 Skutch, Alexander F. 



1961. Helpers among birds. Condor, vol. 63, pp. 198-226. 



