602 MANUAL OF PHILIPPINE BIRDS. 
588. HYLOTERPE ALBIVENTRIS Grant. 
HIGHLAND THICKHEAD. 
_Hyloterpe albiventris GRANT, . Brit. Orn. Club (June 30, 1894), 3, 
49; Ibis (1894), 511; WHITEHEAD, Ibis (1899), 225 (habits) ; SHARPE, 
Hand-List (1903), 4, 313; McGrecor and WorcrEsTER, Hand-List 
(1906), 93. 
Hyloterpe mindorensis BoURNS and WorcESTER, Minnesota Acad. Nat. Sci. 
Oce. Papers (December 8, 1894), 1, 22; McGrecor and WorcEsTER, 
Hand-List (1906), 93. 
Luzon (Whitehead, McGregor, Bartsch) ; Mindoro (Whitehead, Bourns & Wor- 
eester, McGregor). ‘ 
Adult.—Above dull olive-green, brighter on the rump, wings, and tail; 
sides of head and ear-coverts slightly washed with olive; chin, throat, 
and chest hair-brown streaked with white and slightly washed with 
olive; abdomen white faintly washed with yellow; sides and flanks more 
dusky ; crissum pale lemon-yellow; axillars and wing-lining white faintly 
washed with yellow. Length, about 165. Male, wing, 82; tail, 70; 
culmen from base, 15; bill from nostril, 10; tarsus, 22. Female, wing, 
79; tail, 66; culmen from base, 16; bill from nostril, 9.5; tarsus, 22. 
Young.—A very young bird taken in April resembles the young of 
H. illex. Above dark walnut-brown; below vinaceous-cinnamon; three 
or four outer primaries edged with pale gray; the inner primaries edged 
with olive-green, some of them washed with reddish brown. 
“Very rare in Mindoro. But a single female specimen obtained. It 
measures 165 in length; wing, 78; tail, 66; culmen, 17.8; tarsus, 21; 
middle toe with claw. 19.” (Bourns and Worcester MS.) 
589. HYLOTERPE WHITEHEADI Sharpe. 
PALAWAN THICKHEAD. 
Hyloterpe whiteheadi SHARPE, Ibis (1888), 311; Hand-List (1903), 4, 3138; 
McGrecor and Worcrster, Hand-List (1906), 93. 
Hyloterpe platent BLASIuS, Ornis (1888), 311. 
Palawan (Whitehead, Platen, Bourns & Worcester, Everett, Celestino, White). 
Adult.—Upper parts hair-brown; edges of wing-feathers and of rec- 
trices slightly more ashy brown; auriculars and sides of neck hair-brown ; 
throat white with faint drab-gray streaks; chest drab-gray; remainder 
of under parts white. Male, wing, 79; tail, 62; culmen from base, 17; 
bill from nostril, 10; tarsus, 19. Female, wing, 78; tail, 65 culmen 
from base, 16; bill from nostril, 10; tarsus, 18. 
“Quite rare in the localities collected in by us. A male measures, 
length, 149; wing, 80.5; tail, 60; culmen, 17.5; tarsus, 18.8; middle toe 
with claw, 16. A female, length, 159; wing, 8%; tail, 62.7; tarsus, 
18.5; middle toe with claw, 17.5; culmen, 22. Iris dark brown; legs, 
feet, and nails light slate; bill black.” (Bourns and Worcester MS.) 
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