44 ANNALS OF THE QUEENSLAND MUSEUM, No. 6 
tips, causing an inconspicuous scaly appearance ; lores as the 
frontals ; eyelid .dusky white ; cheeks and ear coverts mottled 
olive green and white, the latter predominant on the cheeks ; 
chin and throat nearly white, narrowly striated with a few black 
streaks on the feathers ; upper breast yellowish white, passing 
into dull greenish yellow on the lower breast, abdomen, and flanks ; 
under tail coverts white, very slightly washed with yellow ; thighs 
very pale brown ; axillaries, under wing coverts and bastard 
wing as under tail coverts ; under surface of quills with whitish 
edges on the inner web ; iris yellow ; bill black-brown ; legs 
light brown. Length, 96 mm. ; culmen, 7 ; wing, 52 ; tail, 48 ; 
tarsus, 14.5. 
The female does not differ from the male in any notable respect. 
Habitat, Bellenden Ker Range, at a height of 4000 feet. 
This species has the delicately streaked throat and non rufous 
forehead of A. apicalis, the dull rufous upper tail coverts of pusilla, 
and the pale yellow under surface of diemensis ; wants the bold 
throat markings of pusilla, the brightly coloured upper tail coverts 
of apicalis, and the size and brown flanks of diemensis, and the white 
spot on the tail feathers is not possessed by any other species. 
Gerygone fusca. 
In the Herberton district this species is represented by a race 
devoid of the white lore, and having the side of the neck light 
reddish brown instead of gray, but as these seem to be the only 
constant differences, it is advisable to wait for information about 
the habits, nidification, etc., of the birds before granting them 
higher rank. 
An Undescribed Pachycephala. 
A rather dishevelled specimen of a female thickhead was 
among the zoological spoil obtained in June, 1889, by the scientific 
expedition to the Bellenden Ker Range at that time in progress. 
Though the skin appeared then as now to have been derived from 
an unknown bird, it was thought well to defer a description of it 
until further light was thrown upon the species by the appearance 
of the male. Unfortunately, it has been found impossible to take 
any step towards making the discovery, the Museum being deprived 
of later years of the means of sending a collector to the spot. As 
there still seems to be no immediate prospect of obtaining the 
significant sex, the writer is induced to give the following account 
of the female under the name of Pachycephala mestoni. 
Upper surface dull olive green ; base of the feathers blue-black 
on the forehead, passing insensibly into slate-blue on the hind 
head and all beyond, the dull yellowish olive-green of the broad 
margins of the feathers becoming more distinctly yellow on the 
upper tail coverts ; tail brown, all its quills, except the outermost 
