HYLOTERPE. 599 
“Male adult (Japan).—Differs from L. cristatus in having the upper 
parts much brighter, usually rich fox-red, the forehead and fore crown 
and a broad supercilium pure white; wings blackish, externally margined 
with rufous; tail fox-red tipped with dull white. Culmen, 17.7; wing, 
89; tail, 94; tarsus, 21.” (Dresser.) 
Subfamily PACH YCEPHALIN. 
Bill at nostril as broad as it is high, compressed toward the tip; a 
well-marked notch near tip of bill; feathers of chin and jaw with their 
shafts produced and hair-like; rectrices nearly uniform in length; tail 
decidedly shorter than wing. 
Genus HYLOTERPE Cabanis, 1847. 
Characters same as those given for the Subfamily. 
Species. 
a’, Upper parts olive-green. 
bt. Breast, abdomen, and crissum lemon-yellow, or at least washed with yellow. 
c', Breast and abdomen bright lemon-yellow. 
d', Larger; bill longer; back duller olive-green........ philippinensis (p. 599) 
d?, Smaller; bill shorter; back brighter olive-green.......... apoensis (p. 600) 
c. Breast, sides, and abdomen washed with yellow. 
d', Smaller; breast and sides less strongly washed with yellow. 
fallax (p. 601) 
d?, Larger; breast and sides more strongly washed with yellow. 
illex (p. 601) 
b?. Breast olivaceous gray; abdomen white; crissum pale yellow. 
albiventris (p. 602) 
a*. Upper parts brown. : 
bt. Smaller; wing, about 80 mm.; tail, 62; upper parts hair-brown, slightly 
CIS foe oc 5 le lp = a na RS ee EC whiteheadi (p. 602) 
b?.. Larger; wing, 84 mm. or more; tail, 66 or more. 
ec. Larger; upper parts mars-browN.........------------------------aeem winchelli (p. 603) 
ce, Smaller; upper parts dark walnut-brown; auriculars vinaceous cinnamon. 
— homeyeri (p. 603) 
—584. HYLOTERPE PHILIPPINENSIS Walden. 
LUZON THICKHEAD, 
Hyloterpe philippinensis WALDEN, Ann. & Mag. Nat. Hist. (1872), 10, 252; 
Trans. Zool. Soc. (1875), 8, 179, pl. 31, fig. 2; GRANT and WHITEHEAD, 
Ibis (1898), 241 (eggs); WHITEHEAD, Ibis (1899), 225 (habits, nest) ; 
SuHarpe, Hand-List (1903), 4, 313 (part) ; McGrecor and WORCESTER, 
Hand-List (1906), 93 (error in locality list). 
Pachycephala philippinensis Gapow, Cat. Birds Brit. Mus. (1883), 8, 221. 
Luzon (Meyer, Whitehead, McGregor). 
Adult.—Top of head and hind neck olive-brown, shading into dull 
olive-green on back; lighter olive-green on rump, tail-coverts, and edges 
of wing-feathers and rectrices; lores and ear-coverts drab; chin, throat, 
and malar region white; chin-feathers with black shafts; throat with 
