616 - MANUAL OF PHILIPPINE BIRDS. 
so yellow, especially on the crown and forehead, in having darker and 
more greenish olive ear-coverts, all the feathers of the upper side having 
much darker gray bases, more @@@enish flanks, and a black loral patch 
which is not developed in Z. meyent. Wing ¢ 2, 52 to 53.5; tail, 36; 
bill, 9.” (Hartert.) 
608. ZOSTEROPS VULCANI (Hartert). 
MOUNT APO SILVEREYE, 
Zosterops whiteheadi vulcani HARTERT, Bull. Brit. Orn. Club (1903), 14, 14. 
Zosterops vulcani McGREGoR and WorcESTER, Hand-List (1906), 95; GRANT, 
Ibis (1906), 473. 
Mindanao (Goodfellow, Mearns) . 
Diagnosis.—“Entirely like Z. w. whiteheadi but larger and with a 
dusky shade under the eye. Wing, 58.8; tail, 40; bill, 10.5.” (Hartert.) 
A male from Mount Apo measures: Wing, 55; tail, 38; culmen from 
base, 12.5; bill from nostril, 8; tarsus, 18. A female, wing, 54; tail, 
37.5; culmen from base, 12.5; bill from nostril, 7.5. 
This subspecies appears to be very slightly different from Zosterops 
meyent. 
609. ZOSTEROPS HALCONENSIS Mearns. 
MOUNT HALCON SILVEREYE. 
Zosterops halconensis MEARNS, Phil. Jour. Sci. (1907), 2, sec. A, 360. 
Mindoro (Mearns). 
“Characters.—Sexes alike. Similar to Zosterops vulcani, but slightly 
larger. Wing, 56 against 55 millimeters; tail, 42 to 41; culmen, 12 
to 11.5. Color yellower, but without a longitudinal yellow stripe on 
middle of abdomen; sides more whitish gray; cheeks and ear-coverts 
paler and yellower, but the yellow confined to the chin and throat not 
suffusing the upper chest ; upper surfaces of a more golden green. From 
Zosterops whiteheadi the Mindoro form is easily distinguished, when 
similar seasonal plumages are compared, by its greater size and more 
yellow coloration.” (Mearns.) 
610. ZOSTEROPS BATANIS McGregor. 
BATANES SILVEREYE, 
Zosterops batanis McGrecor, Phil. Jour. Sci. (1907), 2, sec. A, 343. 
Da-ti-v%, Batan. 
Batan (McGregor). 
Male (type).—Above yellowish green or light olive-yellow, brighter 
on crown, rump, and upper tail-coverts; lores and frontal band bright 
yellow; eye surrounded by a ring of silky white feathers, interrupted 
in front by a small dusky spot; an indistinct dusky line below eye-circle ; 
auriculars and sides of neck light yellowish green like the crown; chin, 
throat, breast, and under tail-coverts bright yellow like the forehead ; 
