72 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



form white wedges ; center of abdomen as in the male ; sides, flanks, vent, 

 thighs, and under tail coverts as in the male but with the white tips 

 far more developed and (on the sides and flanks) with the brown and black 

 markings much coarser, less like vermiculations, and the brown pale 

 tawny, not sepia; under wing coverts like the lesser upper ones but with 

 much more white; supraorbital "comb" dull orange-yellow; iris brown, 

 bill blackish ; feet varying from pale brownish gray to pale greenish gray, 

 soles and back of tarsi yellowish ; claws pale horn gray. 



Immature male. — Similar to the adult but with the rectrices narrower 

 and more pointed at the tip ; body plumage often retaining some of the 

 Juvenal plumage, especially the innermost secondaries and in the head 

 and neck regions which are the last to molt, except for the innermost 

 secondaries (tertials). 



Immature female. — Similar to the adult but dififering from it in the 

 same way that the immature and adult males differ. 



Juvenal (sexes alike). — Similar to that of the adult female but with 

 the feathers of the upperparts, wing, and tail with conspicuous shaft 

 streaks of white (more or less tinged with tawny) ; the rectrices brown 

 to the tips (no terminal gray band) ; the chin and upper throat more 

 extensively whitish ; the breast and abdomen paler — buffy whitish to 

 pale tawny whitish, the dark sepia to clove brown markings broken so 

 as to appear more like spots than bars ; no median abdominal gray area 

 as in adult ; iris pale sepia ; bill grayish brown ; feet light olive-green, 

 claws pale brown to horn color. 



Dozvny young (sexes alike). — Above between buckthorn brown and 

 ochraceous-tawny, paler and more yellowish on the forehead and inter- 

 scapular area ; the forehead, crowm. and sides of head with fuscous to 

 dark sepia elongated blotches, and with smaller, less conspicuous dark 

 marks on the lower back ; lores, chin, throat, and abdomen amber yellow, 

 the breast, sides, and flanks similar but with an ochraceous wash ; iris 

 pale gray-brown ; bill brownish, tipped flesh color ; feet yellow, claws 

 horn color. 



Adult male.— Wing 208-224 (217.1); tail 131-160 (151.7); exposed 

 culmen 19.2-22 (20.1) ; tarsus 43.1^7 (45.1) ; middle toe without claw 

 42.3-49.5 (45.9 mm.).'^^ 



Adult female.— W'mg 178-205 (194.7) ; tail 116-131 (121.1) ; exposed 

 culmen 16.6-22.8 (19.4); tarsus 39.8-42.9 (41.1); middle toe without 

 claw 37.2-42.8 (39.8 mm.).^^ 



Range. — Resident in the islands of southeastern Alaska except Prince of 

 Wales Island (Admiralty, Baranof, Chichagof, Coronation, Douglas, 

 Etolin, Kupreanof, Mitkof, Wrangell Islands) and immediately adjacent 



Six specimens from Queen Charlotte Islands and Alaska. 

 Nine specimens from Alaska. 



