THE BIRDS OF AUSTRALIA. 
Epthianura , separating them into different genera as hereafter used, observing : 
“ The type of Epthianura (Gould) is the Acanthiza albifrons of Jardine and 
Selby. Though the males of E. albifrons (Jardine and Selby) and E. tricolor 
(Gould) are quite unlike in coloration, they have dull-coloured females which 
somewhat resemble each other, the red rump of the latter being the most 
noticeable feature. From both of these species the male of E. aurifrons (Gould) 
absolutely differs in its coloration ; but here again the dull female is not so 
very dissimilar, the red rump being replaced by a yellow one, while a yellowish- 
green wash pervades the lower surface. E. crocea (Castelnau and Ramsay) 
recalls the preceding species in the style of coloration of the male, while the 
female is not so markedly different, the yellow rump being present, while on 
the under-surface the yellow is mainly restricted to the flanks, lower abdomen, 
and under tail-coverts, where, however, it is not so noticeable as in the preceding 
species. ... E. tricolor (Gould) has its bill longer and more slender than 
in E. albifrons while it has shorter claws, and, though the wing is as long, the 
first primary is appreciably shorter. . . . The entirely different coloration 
of the males has more significance than the apparent similarity of the so-called 
structural characters.” 
At present we have no exact data to determine the position of these 
“ Chats,” and their location as such is questionable ; a comparison of their 
osteological structure might assist in determining the relationships of the 
group. 
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