96 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



d. Chest, sides, and flanks buffy, transversely spotted with dark sooty brown or 

 blackish; interscapulars with distinct shaft-streaks of buff. (Planesticus 

 tristis, young.) 

 e. Upper parts light buffy olive, the remiges and tail light olive. 



Planesticus tristis tristis, young (p. 108) 

 ee. Upper parts dark sooty olive, the remiges and tail sooty blackish. 



Planesticus tristis leucauchen, yaung (p. Ill) 

 dd. Chest, sides, and flanks nearly uniform buffy brown; interscapulars without 



distinct shaft-streaks Planesticus obsoletus, young (p. 115) 



cc. Under parts without white. 

 d. Remiges and rectrices brown; under parts not heavily spotted. 

 e. Under parts ochraceous-buff, the breast, etc., transversely spotted with 

 grayish brown or olive; upper parts light olive-brown. 



Planesticus grayi grayi, young (p. 117) 



ee. Under parts olive-tawny, the breast, etc., transversely spotted with black; 



upper parts dark olive-brown. .Planesticus infuscatus, young male (p. 122) 



dd. Remiges and rectrices sooty black; under parts heavily spotted with sooty 



black Planesticus nigrescens, young (p. 124) 



PLANESTICUS RUFITORQUES (Hartlaub). 

 RUFOUS-COLLARED THRUSH. 



Adult male. — Upper parts uniform black, « interrupted by a broad 

 collar of cinnamon-rufous or chestnut-rufous across hindneck; chin, 

 more or less extensively, whitish; upper throat streaked with black 

 and dull cinnamon-rufous (occasionally with some whitish), rarely 

 uniform black or blackish; lower throat, chest, and breast, uniform 

 cinnamon-rufous or rufeus-tawny; sides, flanks, abdomen, and under 

 tail-coverts uniform black, sometimes (in younger individuals dull 

 grayish black with broad grayish margins to feathers; under tail- 

 coverts blackish or dusky gray with more or less distinct (sometimes 

 broad and conspicuous) mesial streaks of white or whitish; bill yel- 

 lowish (bright yellow in life), more or less extensively dusky at tip; 

 legs and feet dull yellowish in dried skins (yellow in life?); length 

 (skins), 230-245 (236); wing, 130-139 (135); tail, 99-106.5 (103.1); 

 exposed culmen, 20-21 (20.3); tarsus, 31-33 (32.1); middle toe, 21- 

 23 (22) .& 



Adult female. — Much duller and lighter in color than the adult 

 male. Upper parts grayish brown, the feathers of back, rump, etc., 

 margined with gray, the pileum more decidedly brown and with 

 indistinct darker shaft-streaks; hindneck more rufescent or fulves- 

 cent brown, forming a very indistinct collar; chin and throat dull 

 white, pale fulvous-gray or dull cinnamon, more or less distinctly 

 streaked with dusky; chest and breast plain dull buffy cinnamon or 

 dull tawn}^; sides, flanks, and abdomen buffy grayish, the under tail- 



a Some (but by no means all) winter specimens show more or less distinct brown 

 margins to feathers of the pileum, and rather distinct slaty margins to feathers of the 

 rump and upper tail-coverts; possibly these are younger birds. 



*> Ten specimens. 



