Dicæum assimilis Bourns and Worcester, Minnesota
Acad. Nat. Sci. Occ. Papers (1894), 1, 19; McGregor 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.
"A male from Sulu measures 89 in length; culmen, 13; wing, 52; tail,
24.6; tarsus, 13.4. Two females from the same locality measure
84 in length; culmen, 12.7; wing, 50; tail, 24.6; tarsus, 12. We
have only females from Tawi Tawi and can not be quite sure of the
identification." (Bourns and Worcester.)