256 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



in text (crit.; color). — Oberholser, Bird Life Louisiana, 1938, 165 (Loui- 

 siana; casual winter res.; records from Cameron Parish, Iberville Parish, and 

 La Barre).— Brandt, Auk, Iv, 1938, 287, in text (San Diego County, Calif.; 

 spec). — Burleigh and Lowery, Occ. Pap. Mus. Zool. Louisiana State 

 Univ., No. 8, 1940, 97 (w. Texas; Guadalupe Mountains). — Mengel, Auk, 

 lix, 1942, 104, in text (Colfax, N. Mex.). — Twomey, Ann. Carnegie Mus., 

 xxviii, 1942, 378 (Uinta Basin, Utah). — van Rossem, Auk, lix, 1942, 450, 

 in text (spec; Chiricahua Mountains, Ariz.; Colonio Pacheco, Chihuahua; 

 Reserve, N. Mex. ; breeds se. of the Sierra Madre to w. c Chihuahua) ; Occ. 

 Pap. Mus. Zool. Louisiana State Univ., No. 21, 1945, 5G (Sonora; rare winter 

 vis.). — American Ornithologists' Union, Auk, Ixi, 1944, 445 (nomencl.). — 

 Behle, Condor, xlvi, 1944, 71 (Utah; reported). — McAtee, Wils. Bull., 

 Ivi, 1944, 154 (Gulf State migration). 



Buieo jamaicensis furtesi HoussE, El Hornero, viii, 1941, 47, in text (breeding 

 range on map; s. New Mexico). 



Buteo borealis fuertesi Taverner, Condor, xxxviii, 1936, 70, in text (syn.); Auk, 

 liii, 1936, 360, in text (crit.). 



Buteo jamaicensis Baumgartner and Baumgartner, Wils. Bull., Ivi, 1944, 210 

 (Lake Carl Blackwell, Okla. ; banding). 



BUTEO JAMAICENSIS ALASCENSIS Grinnell 



Alaskan Red-tailed Hawk 



Adults (sexes alike). — Similar to light-phase adult of Buteo j. 

 borealis but smaller, with the abdomen marked chiefly with reddish 

 brown and only sparsely with fuscous and with the rectrices having 

 several narrow wavy black bars. 



Juvenal (sexes alike) . — Like that of borealis, but smaller. 

 Adult male.— Wing 334-362 (347.6); taU 193.6-243 (217.2); culmen 

 from cere 23.1-26 (24.6); tarsus 80-85.5 (87.6); middle toe without 

 claw 41-47 (43.8 mm.).^^ 



Adult female.— Wing 358-363 (361.3); tail 217.9-247 (228); culmen 

 from cere 26-27.6 (26.8); tarsus 77.5-88.8 (83.1); middle toe without 

 claw 45-45.3 (45.1 mm.) (5 specimens). 



Range.- — -Breeds from southeastern Alaska (Yakutat Bay; Chicka- 

 mun River; Duke of York Island; Baranof Island) to the Queen 

 Charlotte Islands, British Columbia. Winter limits unlcnown. 



Type locality. — Glacier Bay, Alaska. 

 Buteo borealis cabirus (not Buieo calurus Cassin) Bean, Proc U. S. Nat. Mus., 

 V, 1882, 162 (Baranof Island, Alaska, June). — Osgood, North Amer. Fauna, 

 No. 21, 1901, 42 (Cumshawa Inlet, Queen Charlotte Islands, June 22). — 

 Laing and Taverner, Ann. Rep. Nat. Mus. Canada for 1927 (1929), 78, 

 79, in text (Chitina River region, Alaska). — American Ornithologists' 

 Union, Check-list, ed. 4, 1931, 66, part (se. Alaska). — Jewett, Murrelet, 

 xxiii, 1942, 69 (Eagle and Chilkat Rivers, se. Alaska). 

 Buieo borealis alascensis Grinnell, Univ. California Publ. Zool., v, 1909, 211 

 (Glacier Bay, Alaska; coll. Mus. Vert. Zool.). — American Ornithologists' 

 Union, Auk, xxvi, 1909, 296 (Check-list No. 337 e); Check-list, ed. 3, 1910, 



2" Seven specimens from Alaska and northwestern British Columbia. 



