BIRDS OF NORTH AND MIDDLE AMERICA. 739 



ee. Darker above, the under parts more heavily barred. (Western Alaska 



north of Alaska Peninsula.) Bubo virginianus algistus (p. 750 1. 



♦ dd. Paler (white predominating); feet immaculate. (Northern and central 

 Canada, from Hudson Bay to valley of Mackenzie Piver, breeding south- 

 ward to Saskatchewan, northern Manitoba, and northeastern Alberta; 

 in winter south to Ontario, Wisconsin, Idaho, etc.). 



Bubo virginianus wapacuthu (p. 751). 

 cc. Dark colored. 

 d. Face and upper parts lighter, more rufescent or tawny. (Idaho, north- 

 eastern Oregon, eastern Washington, and northward to Cook Inlet and 



upper Yukon .Valley, Alaska.) Bubo virginianus lagophonus (p. 747j. 



dd. Face and upper parts darker, less rufescent or tawny. 

 e. Under parts darker; feet more heavily spotted or mottled. (Pacific coast 

 district from northern California to southern Alaska.) 



Bubo virginianus saturatus (p. 748). 

 ee. Under parts lighter; feet less heavily spotted. (Coast district of Labrador 



and Ungava.) Bubo virginianus heterocnemis (p. 750). 



aa. Wing averaging less than 350 mm. in females, less than 321 mm. in males. 

 h. Wing averaging not less than 340mm. in females, not more than 320 mm. in 

 males, 

 c. Plumage with much rufous or tawny. (Costa Rica; Panama?) 



Bubo virginianus mesembrinus (p. 754). 

 cc. Plumage with little if any rufous or tawny. 

 d. More heavily barred below; bill larger. (Central Mexico to Guatemala.) 



Bubo virginianus melancerus (p. 753), 

 dd. More narrowly and densely barred below; bill smaller. (Southern South 

 America, north to Peru and southern Brazil.) 



Bubo virginianus magellanicus (extralimital).a 

 66. Wing averaging less than 340 mm. in females, less than 316 in males, 

 c. Culmen (without cere) 29 mm.; wing 315 (in female); with less tawny or 

 ochraceous. (Yucatan; British Honduras.) 



Bubo virginianus mayensis (p. 753). 

 cc. Culmen (without cere) 27.5 mm., wing 330 in female; with more tawny or 

 ochraceous. (Southern Lower California.) 



Bubo virginianus elacMstus (p. 746). 



BUBO VIRGINIANUS VIRGINIANUS (Gmelin). 



GREAT HORNED OWL. 



Adults (sexes alike). — Plumage in general tawny or ochraceous 

 basally, this partially exposed on pileum and hindneck, on scapulars, 

 rump, and sides of breast, sometimes on other portions of the under 

 parts; general color of upper parts dark sooty brown or dusky, much 

 broken by coarse transverse mottling of grayish white, the dusky 

 greatly predominating on pileum and hindneck, where forming broad 

 ragged or coarsely and irregularly serrated longitudinal stripes which 

 become blended on forehead; outermost scapulars and some of the 

 middle and greater wing-coverts with inconspicuous irregular spots 



aBuho magellanicus Daudin, Tr. Orn., ii, 1800, 210 (based on Buffon, PI. Enl., 

 385; Straits Magellan). —Sirix nacurulu Vieillot, Nouv. Diet. d'Hist. Nat., vii, 1817, 

 p. 44 (based on Hibou des terres magellaniques Buffon, PL Enl. no. 383 [error! 385]). 



