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 Goffiu'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 greeu 

 (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. 

 Yonng 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 Henricii Temm. PL Col. Ill, N". 524 (1831). 

 Megaluema Henriet Sbarpe, Ibis 1879, p. 239; Everett, L. B. Born. 

 p. 168. 



A probably immature male from Nanga Raoen, and 

 three females from Long Bloe (Upper Mahakkam). — Iris 

 brown, bill black, feet dirty olive-green. The specimen 



Notes iroiTi the Leyden DMuseum , "Vol. XXI. 



