160 BIRDS OF THE 
ture the great number of females are all considered to be 
immature. Besides the registered specimens in the Leyden 
Museum the one in Goffin’s Catalogue and my own series, 
I have before me a number of specimens from Sumatra, 
collected by Vorderman, Klaesi and Hagen, and all the 
specimens marked as males have the fore-head more or 
less golden yellow while this is not the case in any of 
those marked as females, 
After thoroughly considering these heavily weighing facts 
I come to the conclusion that the adult female of this 
species may constantly be distinguished from the adult 
males by the following characters: Chin yellowish green 
(not red), shading off into the blue throat, basal part of 
the moustachial streak blue (not yellow), fore-head green, 
somewhat shaded with blue (not golden yellow), extreme 
base of fore-head tinged with yellow, hinder part of the 
superciliary streak blue (not black), the occipital patch 
duller red and less extended than in the male, base of 
lower mandible whitish instead of black, size alike in both 
sexes. Immature birds may be recognized by the less 
overlapping edge of the basal part of the upper mandible. 
Young birds of both sexes are much like the adult females, 
but have the chin tinged with olive-gray, and the blue on 
throat, angle of mouth, under the eye and on the hind 
part of the superciliary streak is more or less absent, 
while the red occipital patch is more or less wanting. 
In the nearly adult male the green chin is intermixed 
with red feathers and the red patch on the sides of the 
throat begins to show very early in males and females, 
23. Cyanops Henricii. 
Bucco Henricti Temm, Pl. Col. III, N°. 524 (1881), 
Megalaema Henrici Sharpe, Ibis 1879, p. 289; Everett, L. B. Born. 
p. 168. 
A probably immature male from Nanga Raoen, and 
three females from Long Bloe (Upper Mahakkam). — Iris 
brown, Dill black, feet dirty olive-green, The specimen 
Notes from the Leyden Museum, Vol. XXI. 
