"Mr. Whitehead's Negros collection contains three adult examples of a little hawk owl, and I am in considerable doubt as to whether this form should not be separated from typical examples of N. philippensis from Luzon. I have before me at the present time nine examples from Luzon, two from Guimaras, four from Negros, and one from Siquijor. All seven birds from the last three mentioned islands differ very considerably from Luzon specimens. The latter have the chest and breast mostly tawny brown, shading into pale tawny toward the edges of the feathers, and the belly and flanks whitish, with rather ill-defined brownish red middles. In Negros birds, as well as those from the other central islands already mentioned, the feathers of the breast and chest are chocolate-brown edged with white, and the rest of the under parts are white, with fairly wide and clearly defined shaft-stripes of a dark brownish red color. "The general impression conveyed is, that the Luzon birds have the under parts tawny brown, suffused with white on the belly and flanks, while in birds from the central islands, the chest and breast, as well as the rest of the under parts, are white, clearly striped with reddish brown. These birds remind one of small examples of Ninox japonica, though of course the latter has the stripes on the underparts of a much darker color. It is quite possible that it may be found necessary to separate the birds from Negros, etc., under some distinctive name, but before doing this I should like to have more material from the adjacent islands." (Grant.) 225. NINOX EVERETTI Sharpe. EVERETT'S HAWK OWL. Ninox everetti Sharpe, Bull. Brit. Orn. Club. (1897), 6, 47; Ibis (1897), 449; Hand-List (1899), 1, 290; McGregor and Worcester, Hand-List (1906), 47. Siasi (Everett). Diagnosis.--Similar to Ninox reyi but pale spots of primaries few, fulvescent, very slightly spotted with white; and abdomen, flanks, and thighs ocherous-fulvous, not white spotted with brown. Length, 241; wing, 195. [31] This is a little-known species of which more specimens should be examined and compared with Rey's hawk owl. 226. NINOX SPILOCEPHALA Tweeddale. TWEEDDALE'S HAWK OWL. Ninox spilocephala Tweeddale, Proc. Zool. Soc. (1878), 940; Sharpe, Hand-List (1899), 1, 290; McGregor and Worcester, Hand-List (1906), 47. Basilan (Everett, Steere Exp., Bourns & Worcester, McGregor); Mindanao (Everett, Steere Exp., Bourns & Worcester, Celestino). Adult.--Very similar to Ninox philippensis from which it differs in having the head and neck spotted with rufous or tawny brown and the white spots on primary- and secondary-coverts larger; decomposed feathers below eye unusually long and entirely covering the true ear-coverts. A male from Basilan is 230 in length; wing, 177; tail, 83; culmen from base, 22; tarsus, 26. Female, length, 230; wing, 158; tail, 82; culmen from base, 21; tarsus, 28.