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 illex McGregor, 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.
588. HYLOTERPE ALBIVENTRIS Grant.
HIGHLAND THICKHEAD.
- Hyloterpe albiventris Grant, Bull. Brit. Orn. Club (June 30, 1894), 3, 49; Ibis (1894), 511; Whitehead, Ibis (1899), 225 (habits); Sharpe, Hand-List (1903), 4, 313; McGregor and Worcester, Hand-List (1906), 93.
- Hyloterpe mindorensis Bourns and Worcester, Minnesota Acad. Nat. Sci. Occ. Papers (December 8, 1894), 1, 22; McGregor and Worcester, Hand-List (1906), 93.