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 
oncrissum. Base of bill whitish ggW ing, 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. DICHZUM SIBUYANICUM Bourns and Worcester. 
SIBUYAN FLOWERPECKER, 
Dicewm sibuyanicum BourNs and WoRCESTER, Minnesota Acad. Nat. Sci. 
Oce. Papers (1894), 1, 18; McGrecor, Bur. Govt. Laboratories (1905), 
25, 18; McGrecor 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. DICAEUM ASSIMILE Bourns and Worcester. 
SULU FLOWERPECKER. 
Diceum assimilis BourNs and WorcEsTER, Minnesota Acad. Nat. Sci. Oce. 
Papers (1894), 1, 19; McGrEcor and Worcester, Hand-List (1906), 96. 
Sulu (Bourns € Worcester) ; Tawi Tawi (Bourns & Worcester). 
“Adult male.-—Above exactly like D. sibutense, 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. sibutense, 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. sibutense 
and the under surface of D. trigonostigma. 
“Adult female like that of D. sibutense, 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. 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. 
