700 MANUAL OF PHILIPPINE BIRDS. 



feeding is absolutely unmistakable, and can be heard for a considerable 

 distance. They feed for the most part in the tops of high trees, seldom 

 coming down into the second growth. They can, however, be readily 

 called by imitating their note. 



"Eleven males average: Length, 192; wing, 111; tail, 71; culmen, 

 23.8; tarsus, 21; middle toe with claw, 23. Five females, length, 182; 

 wing, 105; tail, 71; culmen, 23.6; tarsus, 20; middle toe with claw, 22. 

 Iris varies from gray to brown and red; legs and feet dark drab, nails 

 black; bill light reddish brown." (Bourns and Worcester MS.) 



713. ORIOLUS CINEREOGENYS Bourns and Worcester. 

 GRAY-CHEEKED ORIOLE. 



Oriolus cinereogenys BOUBNS and WORCESTER, Minnesota Acad. Nat. Sci. 

 Occ. Papers (1894), 1, 16; Proc. U. S. Nat. Mus. (1898), 20, 558, no. 

 304 (Tawi Tawi and Bongao). 



Bongao (Everett) ; Tawi Tawi (Bourns d Worcester, Everett). 



"In uniting the Tawi Tawi birds with 0. steerii [basilanicus] from 

 Basilan and Mindanao, Dr. Sharpe has evidently overlooked the fact that 

 the Tawi Tawi birds invariably have the cheeks and ear-coverts clear ashy 

 gray, while in birds from Basilan and Mindanao they are just as invariably 

 olive-green. As we find no exception to this rule among our fourteen 

 specimens from Basilan and twenty from Tawi Tawi we have no hesi- 

 tation in separating the birds from the latter locality. It may be added 

 that the rump of the Tawi Tawi birds is rather brighter, and the throat 

 decidedly lighter than in Basilan birds. Not one of our Tawi Tawi birds 

 shows the uniform gray throat of 0. steerii \]basilanicns] . Both species 

 show great variability in the color of under tail-coverts. In some speci- 

 mens they are pure yellow and in others heavily streaked with black. 

 Fifteen males from Tawi Tawi measure as follows : Length, 203 ; culmen, 

 24.3; wing, 116.5; tail, 81; tarsus, 21." (Bourns and Worcester.} 



"Four females average: Length, 200; wing, 111; tail, 76; culmen, 

 23.3; tarsus, 21; middle toe with claw, 21.8. Eyes usually reddish 

 brown, but in two cases gray ; legs and feet dark drab ; bill reddish brown 

 usually, in two cases black. Very common near Tataan, in Tawi Tawi." 

 (Bourns and Worcester MS.) 



714. ORIOLUS ASSIMILIS Tweeddale. 

 CEBTJ ORIOLE. 



Oriolus assimilis TWEEDDALE, Proc. Zool. Soc. (1877), 760, pi. 76 MC- 

 GREGOR and WORCESTER, Hand-List (1906), 107; MCGREGOR, Phil. Jour. 

 Sci. (1907), 2, sec. A, 308. 



Cebu (Everett, Bourns & Worcester, McGregor). 



Adult (sexes similar). Above olive-yellow; lores, jaw, cheeks, chin, 

 throat, and chest cinereous; lower breast, abdomen, flanks, and thighs 



