THE BIRDS OF AUSTRALIA. 
like that of a young bird. Of course, my Acanthiza archibaldi provided for 
the preoccupied Acanthiza magnirostris of Campbell must be regarded as a 
synonym. 
Birds from the Victorian Mallee are referable to the “ pyrrhopygia ” series 
and differ appreciably from the normal Victorian form in having less rufous 
tips to the forehead-feathers, being nearly whitish, the paler greyish upper-colora- 
tion, the bright red rumps and the different tail-coloration, the black being 
extensive, instead of a well-marked bar, and the inner webs of the outer -feathers 
with white spots. The under-surface shows pale huffish flank coloration and pale 
buffish- white under tail -coverts. These may be called : 
Acanthiza. pusilla lingerandi subsp. nov. 
Type from Lingerandi. 
It may be that these will intergrade with the form I have named : 
Acanthiza pusilla hamiltoni 
from Coonalpyn, Ninetymile Desert, South Australia, but I have not the con- 
necting links. The Coonalpyn birds are darker above with duller red rumps, 
darker flanks and pale buffish under tail-coverts. Of two birds collected together 
by Dr. Cleland on the same day, time and place, one labelled female is paler than 
the one sexed male, has a very much shorter bill, shorter wing tail and 
tarsus. With these may be associated the South Australian birds from Mannum, 
Tailem Bend, Crystal Brook, etc., which also vary in coloration, length of 
wing, bill, etc. The differences in the subspecies are marked in series but 
individuals could be picked out to represent different species such as 
ewingii, pyrrhopygia , rufifrons, etc. Of this form Acanthiza pyrrhopygia 
Gould (not V. & H.) is a synonym. 
The southern New South Wales interior form is : 
Acanthiza pusilla, albiventris North. 
Type from Dubbo, New South Wales. 
North distinctly states that all the birds from New South Wales (of the 
pyrrhopygia style) compared with those from South Australia are of larger 
size, rufous chestnut upper tail-coverts, lighter under-surface with only a slight 
tinge of fulvous and white under tail-coverts. I do not know the range of this 
form as to the South, in Victoria, as above noted, a different bird occurs, and 
I also distinguish another race in the northern part of Western New 
South Wales. 
From the Fleurieu Peninsula I have named : 
Acanthiza pusilla samueli 
the type from Myponga. This is the most distinct form, having the tail coloured 
as in the typical forms with no white tips, the fore-head rufous tipped, the upper 
coloration very dark and the flanks and under tail-coverts deep brown. 
430 
