630 MANUAL OF PHILIPPINE BIRDS. 



Female. — Above mouse-gray faintly washed with dull olive-green ; below 

 tea-green, becoming pale yellow on middle of breast and abdomen and 

 on crissum. Base of bill whitish. Wing, 51 ; tail, 24; culmen from base, 

 12; bill from nostril, 8.5; tarsus, 14. 



"Four males average: Length, 94; wing, 52; tail, 26.5; culmen, 14; 

 tarsus, 13; middle toe with claw, 15. Three females, length, 92; wing, 

 49; tail, 26; culmen, 14; tarsus, 13; middle toe with claw, 14. Iris dark 

 brown; legs, feet, and nails dark brown; bill brown to black, yellowish 

 at base." {Bourns and Worcester MS.) 



633. DIOEUM SIBUYANICUM Bourns and Worcester. 



SIBITYAN FLOWERPECKER. 



Dicoeum sibuyanicum Bourns and Worcester, Minnesota Acad. Nat. Sci. 

 Occ. Papers (1894), 1, 18; McGregor, Bur. Govt. Laboratories (1905), 

 25, 18; McGregor and Worcester, Hand-List (1906), 96. 



Sibuyan {Bourns & Worcester, McGregor). 



Male. — Similar to the male of D. intermedium, but the rump more 

 heavily washed with olive-green; chin and throat clear ashy gray without 

 the yellow wash. Iris brown; bill black; legs and nails dark steel-blue. 

 Wing, 56 ; tail, 26 ; culmen from base, 14 ; bill from nostril, 9 ; tarsus, 14. 



Female. — Similar to the female of D. intermedium. Wing, 52; tail, 

 24; culmen from base, 13; bill from nostril, 9; tarsus, 14. 



"Average measurements from nine males: Length, 99; culmen, 15; 

 wing, 53; tail, 26; tarsus, 13. From two females: Length, 97; culmen, 

 15; wing, 50; tail, 24.6; tarsus, 14." {Bourns and Worcester.) 



634. DIOEUM ASSIMILE Bourns and Worcester. 



StTLU FLOWERPECKER. 



Dicceum assimilis Boukns and Worcester, Minnesota Acad. Nat. Sci. Occ. 

 Papers (1894), 1, 19; McGregor and Worcester, Hand-List (1906), 96. 



Sulu {Bourns & Worcester) ; Tawi Tawi {Bourns d Worcester) . 



"Adult male. — Above exactly like D. sihutense, but chin, throat, and 

 fore breast very much lighter than sides of face, being clear ashy gray, 

 as in D. trigonostigma. As Dr. Sharpe expressly states that this is not 

 the case in S. sihutense, but that the latter species has the throat like 

 the sides of the face and head, it is evident that the Sulu and Tawi 

 Tawi ( ?) birds belong to a distinct species having the back of D. sihutense 

 and the under surface of D. trigonostigma. 



"Adult female like that of D. sihutense, but with the throat, upper 

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

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

 female of D. sihutense, though no such marking is described in the text. If 

 this is the case, the female of D. sihutense differs from that of every other 

 Philippine representative of the "genus. 



