13 
Griscom, Ludlow 
1922. “What is Buteo rufescentior Salvin and Godman?”; Auk, vol. XXXIX, p. 107. 
Suggests that this name may apply to and have priority over alascensis 
( See Ridgway 1923). 
Griscom, Ludlow, and Crosby, Maunsell S. 
1925. “Birds of the Brownsville Region, Southern Texas;" Auk, vol. XLII, pp. 
519-537. 
Calurus apparently resident form, no definite evidence of breeding. Fur- 
ther collecting desirable to settle status of the various Red-tails. 
1926. The same, concluded; Auk, vol. XLIII, pp. 18-36. 
Harlani reported as seen in November 1876 but not taken, cited as a 
record that it would be desirable to reaffirm. 
Hoopes, Bernard A. 
1873. “Description of a New Variety of Buteo;" Proc. Acad. Nat. Sci., Phila., p. 238, 
PL 5. 
Original description and plate of Buteo borealis variety krideri. 
Howell Arthur H 
1911. “Birds of Arkansas;” U.S. Biol. Surv., Bull. No. 38, Washington. 
Borealis rare breeder and fairly common winter resident. Harlani reported 
as fairly common in winter in one locality. 
1924. “Birds of Alabama;” Dept, of Game and Fisheries of Alabama. 
Borealis the only form recognized in the state. 
Iseley V. Wight 
1912. “A List of the Birds of Sedgwick Co., Kansas;” Auk, vol. XXIX, pp. 25-44. 
Krideri given as rare summer resident, borealis as rare winter visitor. 
Jensen, J. K. 
1918. “Notes on the Nesting Birds of Wahpeton, North Dakota;” Auk, vol. XXXV, 
pp. 344-349. 
Sets of eggs of krideri taken and described. 
1923. “Notes on the Nesting Birds of Northern Santa Fe County, New Mexico;” 
Auk, vol. XL, pp. 452-469. 
Calurus common nester. 
1926. “Notes on the Nesting of Some Birds of Northern Santa Fe County, New 
Mexico;” Auk, vol. XLIII, pp. 253-4. 
Krideri seen May 11, 1924. 
Keyes, Charles Reuben 
1907, “Breeding of Harlan’s Hawk in Iowa;” Warbler, vol. Ill, pp. 41-45. 
Five sets of eggs of Harlan’s Hawk from Iowa county described. Identi- 
fication not evident from context, 
Lano Albfrt 
1896. “Buteo borealis harlani in Minnesota;” Auk, vol. XIII, p. 342 (1896). 
Specimen from near Madison, Minnesota, April 12, 1893, not in active 
breeding condition, identified by Ridgway, regarded as a far northern record. 
1926. “Krider’s Hawk in Arkansas;” Auk, vol. XLIII, p. 368. 
Specimens secured near Fayetteville, November and December dates. 
Lincoln, Frederick C. 
1920. “Birds of the Clear Creek District, Colorado;” Auk, vol. XXXVII, pp. 60-77. 
Calurus the commonest large hawk. 
1920. “The Status of Harlan’s Hawk in Colorado;” Auk, vol. XXXVII, pp. 130-31. 
Critical discussion of old records and describes specimen taken near 
Littleton, Colorado, Oct. 16, 1918. 
1925. “Notes on the Bird Life of North Dakota, with Particular Reference to the 
Summer Waterfowl;” Auk, vol. XLII, pp. 50-64. 
Calurus seen at Devils lake. Krideri noted near Napoleon, both July. 
Macoun, John, and Macoun, James 
1909. “Catalogue of Canadian Birds;” Geol. Surv., Canada, Ottawa, Canada. 
Birds of the east including Ontario are referred to borealis, most west of 
Ontario to calurus, and a few krideri specimens noted on the prairies. 
Merriam, Dr. C. Hart 
1891. “Results of a Biological Reconnaissance of South-central Idaho;” Annotated 
List of Birds, pp. 89-113. 
Calurus only race recorded, breeding evidence. 
