176 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



ochraceous-tawny than in umhellus of the same phase. The gray phase 

 is commoner than the brown one. 



Adult (brown phase). — Similar to the gray phase but the tail sayal 

 brown with a cinnamon wash, instead of smoke gray, the upperparts of 

 the head and body and the upper wing coverts browner, less grayish, more 

 rufescent, but not so rufescent as the brown phase of sabini — the pale 

 shaft streaks of the interscapulars pale ochraceous-tawny, the upper back 

 and the lateral brown areas of the interscapulars Dresden browai to 

 mikado brown vermiculated with blackish, lower back and rump dark 

 mikado brown to rufescent Front's brown; ventral barrings darker than 

 in the gray phase — ^Dresden brown darkening on the sides and flanks 

 to mummy brown. This phase is like the .brown phase of togata, but has 

 the black markings less extensive. 



Juvenal. — Similar to that of B. u. uuibcllus but very slightly more ru- 

 fescent (more than in monticola also) above and with the ventral bars 

 darker — sepia to mummy brown ; the rectrices and the outer webs of 

 the secondaries bright ochraceous-tawny. 



Downy young. — None seen. 



Adult male.— Wing 171-191 (181.7); tail 130-170 (152.4); culmen 

 from base 23.4-28.8 (26.3) ; tarsus 40.4-45.5 (42.9) ; middle toe without 

 claw 34.2-41.0 (37.6) ; unfeathered part of tarsus 14.5-29.2 (21.6 mm.).8i 



Adult female.— Wmg 170-185 (176.2) ; tail 123-157 (132.4) ; culmen 

 from base 23.9-28.4 (26.2) ; tarsus 36.0-42.2 (40.6) ; middle toe without 

 claw 32.5-39.3 (35.2) ; unfeathered part of tarsus 14.0-25.0 (19.4 mm.).»2 



This race is intermediate between sabini on the one hand and iimbclloidcs 

 and phaia on the other. 



Range. — Subclimax deciduous woodlands (aspen, poplar, and willow 

 communities) of the montane and subalpine forests (Transition and 

 Canadian Life Zones) ; from Fort Klamath and Harney, Oreg., north- 

 ward, east of the Cascades, excluding the mountains of northeastern 

 Oregon, southeastern and northeastern Washington, through the interior 

 of British Columbia, to Hazelton, and to Canyon Island, Taku River, near 

 Juneau, southeastern Alaska. Specimens from Bear Lake in north-central 

 British Columbia and from Telegraph Creek farther to the northwest in 

 the same province are intermediate between affinis and umbelloides; birds 

 from southeastern Alaska are darker than typical affinis. 



The range of Bonasa mnhelliis affinis, as here delineated, includes 

 populations of much paler and more grayish birds from the more arid 

 interior regions of Washington and Oregon. The extreme examples of 

 this type are found among specimens from Tunk Mountain, Aeneas, 

 Twisp, Mazama, Molson, and Oroville, in Okanogan County, and Swan 



Forty-two specimens from British Columbia, Washington, and Oregon. 

 ' Sixteen specimens from British Columbia, Washington, Oregon, and Idaho. 



