Measurements.
| No. | Sex | Wing | Tail | Tarsus | Culmen from Base |
| 86,369 | ♂ ad. | 57 | 49 | 16 | 13 |
| 86,368 | ♂ ad. | 56 | 47 | 15.5 | 13 |
Remarks.—This new form which is well marked and quite distinct, belongs in the group characterized by possessing a wide stripe of yellow along the median under parts and gray sides and flanks. In the Philippines this group is represented by:
1. Zosterops siquijorensis Bourns & Worcester. Negros, Siquijor.
2. Zosterops boholensis McGregor. Bohol.
3. Zosterops everettii Tweeddale. Cebu.
4. Zosterops forbesi Bangs. Camiguin.
5. Zosterops basilanica Steere. Basilan, Bongao, Dinagat, Leyte, Mindanao, Papahag, Samar, Jolo, Tawi Tawi.
I have given the new form, which is named in honour of Governor W. Cameron Forbes, specific rank because in an enormous genus, largely composed of island forms, like Zosterops, I do not know where to draw the line between species and subspecies and much prefer leaving the question to be decided by some future reviewer of the genus.
Zosterops meyleri McGregor also of Camiguin Island, is a small species with wholly yellow under parts, belonging in a different group of the genus.