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 greenish flanks, and a black loral patch 

 which is not developed in Z. meyeni. Wing $ $ , 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, M earns). 



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 

 meyeni. 



609. ZOSTEROPS HALCONENSIS Mearns. 



MOUNT HALCON SILVEREYE. 



Zosterops halconensis MEARNS, Phil. Jour. Sci. (1907), 2, sec. A, 360. 

 Mindoro (M earns). 



"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 MCGREGOR, Phil. Jour. Sci. (1907), 2, sec. A, 343. 



Da-ti-u, 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; 



