HYLOTERPE. 601 
sienna-brown and larger underlying markings of bluish gray. Measure- 
ments 23 mm. by 17 mm. 
“Nest cup-shaped, very similar to that constructed by Jole philippensis, 
and composed of similar materials—fine roots and dead leaves. It was 
situated in the undergrowth of old forest in a small tree about three 
meters from the ground, and the female bird was obtained.” (Grant and 
Whitehead.) 
586. HYLOTERPE FALLAX McGregor. 
CALAYAN THICKHEAD, 
Hyloterpe fallax McGrecor, Bull: Philippine Mus. (1904), 4, 27; McGrrecor 
and WorcESTER, Hand-List (1906), 93. 
Sa-mot ba-sit, Calayan. 
Calayan (McGregor). 
Adult.—Top of head hair-brown washed with olive-green; remainder 
of upper parts, including exposed edges of wing-feathers and rectrices, 
dark olive-green; ear-coverts drab; chin and throat white with distinct 
dusky shaft-lines, bordered posteriorly by a crescentic, dusky band of 
drab, washed posteriorly with olive; breast, abdomen, and crissum yellow, 
pale for the greater part, but bright lemon-yellow on crissum; sides of 
breast and flanks dusky olive-green; feathers of thighs gray, tipped with 
yellow; edge of wing, under wing-coverts, and axillars white washed 
with yellow; inner webs of quills edged with white. Bill black; legs 
plumbeous; nails flesh-color. Measurements of male cotype: Length, 152; 
wing, 83; tail, 64; culmen from base, 17; bill from nostril, 11; tarsus, 
21. Female cotype, wing, 79; tail, 67; culmen from base, 17; bill from 
nostril, 11; tarsus, 21. 
Immature.—Sides of face and pectoral band washed with faint reddish 
brown; edges of wing-quills reddish brown. Bill dark brown, lower 
mandible lighter. 
587. HYLOTERPE ILLEX McGregor. 
CAMIGUIN THICKHEAD, 
Hyloterpe illec McGrecor, Phil. Jour. Sci. (1907), 2, sec. A, 348. 
Camiguin N. (McGregor). 
Adult.—Similar to Hyloterpe fallax, but slightly larger; breast and 
flanks more strongly suffused with yellow. Male type, length, 183; 
wing, 93; tail, 75; culmen from base, 17; bill from nostril, 11; tarsus, 
21. Female, wing, 86; tail, 67; culmen from base, 16; bill from 
nostril, 12; tarsus, 22. 
Young.—A young bird taken in June has most of the head and 
body covered with vinaceous-cinnamon down, darker on the back; under 
tail-coverts pale yellow; wing-feathers and rectrices blackish brown, 
edged with olive-green; innermost secondaries and’ secondary-coverts 
washed with vinaceous-cinnamon. 
