Characters.—Similar to O. ruficeps ruficeps (Lesson), (specimens from Borneo), but slightly larger, with longer bill; upper parts clearer gray; crown slightly deeper brown.
Measurements.
| No. | Sex | Locality | Wing | Tail | Tarsus | Culmen to Base |
| 57,529 | ♂ ad. | Cagayan de Sulu | 56 | 47 | 24 | 20 |
| 86,601 | ♂ ad. | Sibutu | 54 | 45 | 23 | 20.5 |
Remarks.—There are, in the U. S. N. M., three skins from Sibutu similar in all respects to ours.
Birds from Palawan and Clulion Islands are somewhat smaller than those from Sulu, but agree in color more nearly with them, than they do with true ruficeps of Borneo.
Zosterops forbesi, sp. nov.
Two adult males from Camiguin Island, 2 August, 1921.
Type.—M. C. Z. 86,369 adult ♂, Camiguin Island, 2 August, 1921. W. Cameron Forbes.
Characters.—Similar to Z. basilanica Steere, but larger; upper parts much brighter and yellower,—yellowish citrine rather more strongly yellowish on head and upper tail coverts; yellow of under parts brighter and clearer—bright yellow chrome.