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542 MANUAL OF PHILIPPINE BIRDS. 
Genera, 
a’. Without blue anywhere in the plumage. 
b%. Axillars and wing-lining uniform in color; bill more slender. 
c. Plumage black and dark brows four primaries with outer webs emarginate. 
Planesticus (p. 542) 
c’. Plumage of under parts white, and chestnut or gray, never black; three 
primaries with outer webs emarginate..............-.--...---..0 Turdus (p. 547) 
b?. Axillars and under wing-coverts of two colors, the arrangement of colors 
on one reversed on the other; bill stouter. 
c’. Bill moderate in length; rictal bristles not greatly developed, few and 
lateral. 
ad’. Under parts marked with crescent-shaped black bands. 
Oreocincela (p. 553) 
d’. Under parts marked with fan-shaped spots...............- Geokichla (p. 550) 
ce. Bill long and strongly curved near the tip; rictal bristles numerous and 
long, the anterior ones extending over the nostrils as in the flycatchers; 
throat, breast, and flanks with fan-shaped spots.......... Zoothera (p. 552) 
a’. With more or less blue in the plumage; axillars and wing-lining nearly 
uniform chestnut, or else ocherous barred with black; feathers of under 
parts usually fringed with gray or black....................----.-- Petrophila (p. 554) 
Genus PLANESTICUS Bonaparte, 1854. 
Four primaries, third to sixth, with the outer webs emarginate; bill 
somewhat stouter than in Turdus; otherwise the two genera are very 
similar in structure. The Philippine members of Planesticus are resident, 
mountain species, and may be easily recognized by the colors, smoky 
brown and blackish slate, with no white on the breast and abdomen. 
Species.* . 
KEY BASED ON ADULT MALES. 
a’. Wing less than 115 mm.; sides of lower breast and flanks chestnut. 
mindorensis (p. 543) 
a’, Wing more than 115 mm.; sides of lower breast and flanks not chestnut. 
b%. Chest, head and neck all round nearly uniform broccoli-brown (slightly 
darkest on crown). 
ce: Wing, about 120 mm.; body uniform blackish; under tail-coverts longi- 
tudinally striped with white. 
@. Larger; length, 225; wing, 121; bill from nostril, 14.7; body dark brown. 
thomassoni (p. 544) 
‘@. Smaller; length, 215; wing, 120; bill from nostril, 13; body practically 
Dlaeks sf. 2 ei ee Bee eee ee eee mayonensis (p. 544) 
ce’. Wing less than 120 mm.; body, including tail-coverts and crissum, uniform | 
CLOVE= ROW TE selene sass ce eee see ee ee kelleri (p. 545) 
6°. Chest paler, contrasting strongly with the dark color of crown. 
c’. Smaller; wing, 124.5 mm.; tail, 96.5; chin, throat, and chest pale sooty 
brown, rather lighter on breast, flanks, and belly; median area of under 
surface dark, except at vent; under tail-coverts dark brown with pale, - 
whitish brown :bipisicc:.2d 2 West ee Be eee nigrorum (p. 545) 
* This key to the Philippine species of Planesticus is taken from a paper by 
Mearns, Phil. Journ. Sci. (1907), 2, sec. A, 359. 
