20 BOURNS AND WORCESTER: PRELIMINARY NOTES. 



Female like that of D. sibutense, but with the throat, upper breast 

 and sides of face light ashy grey, uniformly washed with yellow. 

 The plate in Ibis seems to show a faint orange mark on the back of 

 the female of D, sibutense, though no such marking is described in 

 the text. If this is the case the female of D. sibutense differs from 

 that of every other Philippine representative of the genus. 



A male from Sulu measures 3. 50 inches in length. Culmen, 53. 

 Wing, 2.04. Tail, .97. Tarsus, .53. 



Two females from the same locality measure 3.31 in length. Cul- 

 men, .50. Wing, 1.98. Tail, .97. Tarsus. .48. 



Habitat: Sulu, Tawi Tawi (?). Wehave only females fromTawi 

 Tawi and cannot be quite sure of the identification. 



21. Prionochilus aerughiosus sp. nov. 



Adult male in poor plumage. Upper surface light rusty brown, 

 washed with olive yellow on rump, upper tail coverts, outer webs 

 of secondaries and tail feathers. Ear coverts and sides of neck 

 lighter than crown. Lores, like side of head, bordered above and 

 below by narrow, creamy white stripes reaching to eye. A creamy 

 white malar stripe is separated from these and from the throat by 

 light brown stripes of about the same width. Throat white. All 

 the feathers with broad brown shaft markings extending to their 

 tips give the breast a strongly striped appearance. Stripes be- 

 come less sharply defined on the flanks and disappear almost en- 

 tirely on the abdomen. Under tail-coverts creamy white with dark 

 ill-defined brown spots. Under wing-coverts and axillaries creamy 

 white. Inner webs of quills ashy grey, outer webs and tips blackish 

 brown. Female like the male but with less olive yellow above. 

 Young like female but lacking the distinct markings on the under 

 surface. 



Measurements from three males: Length, 4.25 inches. Culmen, 

 .45. Wing, 2.60. Tail, 1.42. Tarsus, .57. 



A female measures 4.00 in length. Culmen, .53. Wing, 2.44. Tail, 

 1.28. Tarsus, .53. Habitat: Cebu, Mindanao. 



22. Prionochilus bicolor sp. nov. 



Adult male: Entire upper surface deep black, with faint metallic 

 blue gloss. Entire under surface, including under wing coverts, ax- 

 illaries and inner webs of quills, white. Bases of feathers of breast, 

 flanks and abdomen slaty black. Bill, legs and feet black. Iris 

 red. Length, 3 25 inches. Wing, 1.98. Tail, .96. Culmen, .42. Tar 

 sus, .56. Habitat: Mindanao. 



Found in the hills back of Ayala, near Zamboanga. 



