1921 BIBLIOGRAPHY 183 



The last two papers contain a few references to occurrences of certain 

 species in Montana. 



N[0RRIS]., J. P. 



1888a. Curious Nests of the Sparrow Hawk. <Orn. and Ool., xiii, p. 106. 

 1888b. A Series of Eggs of Oroscoptes montanus. <Orn. and Ool., xiii, p. 162. 



Obebholser, H. C. 



1898. Description of a New North American Thrush. <Auk, xv, pp. 303-306. 



Original description of Hylocichla ustulata almae. 

 1905. The Forms of Ve7"m.ivora celata (Say). <Auk, xxii, pp. 242-247. 



Contains a number of Montana records, and the original description of 

 V. c. orestera. 

 1907. A New Agelaius from Canada. <Auk, xxiv, pp. 332-336. 



Original description of Agelaius phoeniceus arctolegus, containing Mon- 

 tana records of this subspecies. 

 1914. A Monograph of the Genus Chordeiles Swainson, Type of a New Family of 

 Goatsuckers. ^Bulletin 86, U. S. National Museum, pp. viii-|-123, 6 pis. 



Cites a number of Montana records of different forms, and considers 

 the western Montana bird Chordeiles virginiamis hesperis rather than 

 henryi. 

 1917. The Migration of North American Birds. Second Series. 1. Five Swallows. 

 < Bird-Lore, xix, pp. 320-330, 1 col. pi. 



A continuation of the papers by W. W. Cooke. 

 1918a. The Migration of North American Birds. Second Series. < Bird-Lore, xx, 



pp. 16-19, 219-222, 286-290, 345-349. 

 1918b. Notes on North American Birds. IV. <Auk, xxxv, pp. 62-65. 



Pyfeb, A. M. 



1897. The Nesting of Clarke's Nutcracker. <Oologist, xiv, pp. 100-101. 



1898. Birds of Montana. <Oologist, xv, pp. 14-16. 



A short list of birds observed in the vicinity of Salesville, in the Galla- 

 tin Valley. 



Rathbun, S. F. 



1920. White Gyrfalcon (Falco islandus) in Montana. <Auk, xxxvii. p. 132. 



Richmond, C. W. 



1897. The Western Field Sparrow ... . <Auk, xiv, pp. 345-347, 1 col. pi. 



Richmond, C. W., and Knowlton, F. H. 



1894. Birds of South-central Montana. <Auk, xi, pp. 298-308. 



An important list of birds found in Gallatin and Park counties in two 

 summers' work. 



RlDGW.\Y, R. 



1898. New Species, etc., of North American Birds. — II. F'ringillidae. <Auk, xv, 



pp. 319-324. 



Descriptions of Pinicola enucleator montana and Junco montanus from 

 Montana. Also contains record of Pinicola enucleator alascensis from the 

 Bitterroot Valley. 



Rhoads, S. N. 



1893. The Hudsonian Chickadee and Its Allies .... <Auk, x, pp. 321-333. 

 Rust, H. J. 



1917. An Annotated List of the Birds of Fremont County, Idaho, as Observed dur- 

 ing the summer of 1916. <Condor, xix, pp. 29-43., 12 figs., one map. 



