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BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



but pencilings on under parts less dense, the bars or transverse ver- 

 miculations less numerous and the mesial streaks less distinct.*^ 



Adult male. —Length (skins), 146-171 (156); wing, 128-138 (132.9); 

 tail, 58-63.5 (59.7); culmen, from cere, 8.5-10 (9.5).^ 



Adult female.— Length, (skins), 157-177 (165); wing, 128.5-144 

 (135.2); tail, 58-67 (62.2); culmen, from cere, 8.5-10 (9.3). <= 



Mountains of western North America (Sierra Nevada and Cascade 

 ranges to Rocky Mountains), Mexico, and Guatemala; northward to 

 southern British Columbia (Okanogan Lake), eastern Washington 

 (Snake River east of Pasco) and Idaho (Ketchum), thence southward 

 through Colorado (Estes Park; Boulder County; Fremont County; 

 near Mosca Pass; between Colorado City and Manitou; Bear Creek 

 Canyon, Jefferson County; Breckinridge; Glenwood Springs; near 

 Beulah, 7,200-7,800 feet). New Mexico (Big Hatchet Mountains; 

 Mimbres; Santa Fe; Iron Creek, Gila River), western Texas (Guada- 

 lupe Mountains; Presidio County), Arizona (Huachuca Mountains, 

 4,500-8,000 feet; Chiricahua Mountains; Santa Catalina Mountains, 

 8,000 feet; Springerville ; San Pedro River, Cochise County; Grand 

 Canyon; near Apache), California (Fort Crook; Big Trees, Calaveras 

 County; Tulare County; Raywood Flat, San Gorgonio Mountains; 



o The individual variation in this species is so great that it is somewhat difficult to 

 frame a description covering them all. The variations involve not only the general 

 color (extreme examples of the grayish phase being without a trace of cinnamomeous 

 or ochraceous color, except the partly buffy outer webs of exterior scapulars, while 

 extremes of the rufescent phase have cinnamon-brown and cinnamon-rufous the 

 predominant colors), but also the size of the darker markings on the under parts, 

 which may consist of delicate pencilings or heavy spots and bars. So far as I am able 

 to see, these variations are utterly without geographic significance, except that the 

 extreme rufous phase is, at present, known only from Guatemala, where, however, 

 specimens occur which I am unable to distinguish from northern examples. 



b Twelve specimens. 



c Fourteen specimens. 



Locality. 



MALES. 



One adult male from Guatemala 128 58 9 



Two adult males from New Mexico 131.7 58.5 9.5 



Five adult males from Arizona 133.9 59.9 9.9 



Three adult males from southern California 134 57.2 9.5 



One adult male from Idaho (type of Megascops flammeola idahoensis) 132 61 8.5 



FEMALES. 



Two adult females from western Texas 134.5 61.7 9 



One adult female from New Mexico 133 58.5 8.5 



Eight adult females from Arizona 135 62.4 9.6 



Two adult females from Colorado 133.8 63.5 9.2 



One adult female from eastern Washington 



Culmen, 

 from 

 cere. 



