Zosterops basilanica Steere, List Birds and Mams. Steere
Exped. (1890), 21; Grant, Ibis (1896), 552 (critical notes);
(1897), 238; (1906), 473; Whitehead, Ibis (1899), 232; McGregor
and Worcester, Hand-List (1906), 95.
Basilan (Steere Exp., Bourns & Worcester, McGregor); Bongao
(Everett); Dinagat (Everett); Leyte (Steere Exp., Whitehead);
Mindanao (Everett, Koch & Schadenberg, Bourns & Worcester,
Goodfellow); Papahag (Bartsch); Samar (Steere Exp., Bourns &
Worcester, Whitehead); Sulu (Bourns & Worcester).
Adult.--Resembles Z. everetti, but the lores dusky; from Z. boholensis
and siquijorensis it differs in having a distinct dusky line under the
eye and the upper parts more greenish; sides of breast and of abdomen
dark cinereous. A male from Basilan measures: Wing, 51; tail, 39;
culmen from base, 11; bill from nostril, 7; tarsus, 16. A female, wing,
51; tail, 40; culmen from base, 12; bill from nostril, 7; tarsus, 15.