BIRDS OF NORTH AND MIDDLE AMERICA 253 



Calif.; nest.).— VAN Rossem, Pacific Coast Avif., No. 24, 1936, 20 (Charles- 

 ton Mountains, Nev.). — Alexander, Univ. Colorado Stud. Zool., xxiv, 1937, 

 90 (Boulder County, Colo.; res.; common in summer up to 10,000 feet; in- 

 frequent in winter on plains; spec. Univ. Colorado. Mus.). — Arnold, Con- 

 dor, xxxix, 1937, 32, in text (Coalinga, Calif.; permanent res.). — Bent, U. S, 

 Nat. Mus. Bull. 167, 1937, 167 (life hist.).— Carter, Condor, xxxix, 1937, 

 212, in text (San Bernardino County, Calif.; 1 record). — del Campo, Anal. 

 Inst. Biol., viii, 1937, 268 (Hidalgo, Valle del Mezquital). — Griffee and 

 Rapraeger, Murrelet, xviii, 1937, 16 (Portland, Oreg.; nesting records). — 

 Groebbels, Der Vogel, ii, 1937, 104, in text (sex relations), 170 (data on 

 breeding biology), 231, in text (use same nest for years), 232, in text (lays in 

 ravens' nests), 241, in text (eggs in mixed sets). — Saylor, Condor, xxxix, 

 1937, 175, in text (Nortonville, Calif.; carcass found). — Cowan, Occ. Pap, 

 British Columbia Prov. Mus., No. 1, 1939, 25 (Peace River district, Brit. 

 Columbia, a few breeding records). — Gushing, Condor, xli, 1939, 101, 

 in text (habits). — Hardy, Condor, xU, 1939, 79, in text (Price, Utah; nest, 

 habits). — Hawbecker, Condor, xli, 1939, 83, in text (Monterey, Calif.; 

 carcass). — Kitchin, Murrelet, xx, 1939, 29 (Mount Rainier National Park, 

 abund. fall. migr. ; specs.). — Niedrach and Rockwell, Birds Denver 

 and Mountain Parks, 1939, 49 (res.; distr.). — Gabrielson and Jewett, 

 Birds Oregon, 1940, 187 (Oregon; common permanent res. in every part; 

 descr.; distr.; nest.; habits; food; photo). — Todd, Birds Western Penn- 

 sylvania, 1940, 142 (w. Pennsylvania; descr.; distr.). — Rivers, Condor, 

 xliii, 1941, 65, in text (Nevada; feedmg habits). — Marshall and Lea- 

 THAM, Auk, lix, 1942, 39, in text, 41, in text, 43, in text (Great Salt Lake 

 islands). — Dixon, Condor, xlv, 1943, 207 (Ivings Canyon National Park, 

 Calif.). — Knowlton and Harmston, Auk, Ix, 1943, 589 (Utah; eats crickets 

 and grasshoppers). — Hill, Auk, Ixi, 1944, 230 (meas.). — Knox, Auk, Ixi, 



1944, 23 (Gunnison County, Colo.; fairly common throughout area; seen 

 in Chapanal country near base of Mount Marcellina). — Goodrich, Rep. 

 Kansas State Board Agr., Ixiv, No. 267, 1945, 174 (Kansas; occ. winter res. 

 in east; common farther west). — McAllister and Marshall, Auk, Ixii, 



1945, 182 (Fremont National Forest, Oreg.). 



(?) Butco borcalis calurus Ridgway, Proc. U. S. Nat. Mus., v, 1883, 544 (Cape 

 region. Lower California; crit.). — Brew\ster, Bull. Mus. Comp. Zool., xli, 

 1902, 83 (Cape region; crit.), 86 (meas.). — Townsend Bull. Ainer. Mus. 

 Nat. Hist., xlviii, 1923, 14 (Mirafiores, Lower California, April 25). 



Buteo borcalis h. var. calurus Ridgway', Proc. Boston Soc. Nat. Hist., 1873, 66; 

 Orn. Illinois, i, 1889, 465, 467.— Coues, Birds Northwest, 1874, 353. 



Buteo borealis /3. calurus Ridgway, Orn. 40th Parallel, 1877, 582 (San Francisco, 

 Calif.; Truckee River, etc., Nev.; Utah); in Belding, Proc. U. S. Nat. Mus., 

 i, 1879, 438 (c. California). 



Buteo borcalis subsp. a. calurus Gurney, List Diurn. Birds Prey, 1884, 65. 



Buteo jamaicensis calurus Van Tyne & Sutton, Misc. Publ. Mus. Zool. Univ. 

 Michigan, No. 37, 1937, 19-21, in text (Brewster County, Tex.; uncommon 

 winter vis.; breeding records; food; fig. 2 of pi. 1). — Oberholser, Bird Life 

 Louisiana, 1938, 166 (Louisiana; uncommon winter res. in South; distr.). — 

 Sutton and Burleigh, Occ. Pap. Mus. Zool. Louisiana State Univ. No. 

 3, 1939, 26 (ne. Mexico: Nuevo Le6n; Monterrey, several records; 1 spec; 

 Santa Rosa, 1 spec). — Burleigh and Lowery, Occ. Pap. Mus. Zool. Louisi- 

 ana State Univ., No. 8, 1940, 96 (Guadalupe Mountain region, w. Texas; 

 specs.; records; distr.). — Davis, Condor, xlii, 1940, 82, text (Brazos County; 

 Tex.; winter visitant). — Housse, El Hornero, viii, 1941, 47, in text (w. North 



