Nine specimens, both sexes, from Palawan and Dumaran Islands, June, July, August, and September.
Type.—M. C. Z. 64,334 adult ♂, Puerto Princesa, Palawan Island, 4 August, 1913. W. Cameron Forbes.
Characters.—Similar to A. tiphia tiphia (Linné) and A. t. viridis (Bonaparte) of Borneo, but bill longer and heavier; the upper parts much more yellowish olive-green and the forehead, including the lores, broadly bright yellow.
Measurements.
| No. | Sex | Locality | Wing | Tail | Tarsus | Culmen to Base |
| 64,332 | ♂ ad. | Palawan | 64 | 49 | 20.5 | 19 |
| 64,333 | ♂ ad. | " | 62 | 44 | 21 | 18.5 |
| 64,334 | ♂ ad. | " | 62 | 44 | 20 | 18 |
| 86,684 | ♂ ad. | Dumaran | 62 | 46 | 21 | 18 |
| 86,685 | ♂ ad. | " | 61 | 50 | 19 | 18.5 |
| 41,304 | ♀ ad. | Palawan | 61 | 47 | 20 | 18 |
| 86,683 | ♀ ad. | " | 62 | 48 | 19 | 17 |
Remarks.—The Palawan and Dumaran bird represents a very good form, easily separated from A. tiphia tiphia or A. t. viridis by its larger bill and much brighter upper parts. The series shows no individual variation, and no tendency to ever become dusky or black above.
Orthotomus ruficeps nuntius, subsp. nov.
Three specimens from the Sulu Archipelago; an adult ♂ Sibutu, 23 August, an adult ♂ Cagayan de Sulu, 2 July, and an immature ♀ Jolo, 2 August.
Type.—M. C. Z. 57,529 adult ♂, Cagayan de Sulu, 2 July, 1911. W. Cameron Forbes.