Genus —C HLAMYDERA. 
Chlamydera Gould, Birds Austr. and Adj. Islands, 
pt. L, pi. 3, note, Aug. 1837. New name for 
Calodera Gould. Type (by monotypy) .. Calodera maculata Gould. 
Also spelt— 
Cklamydodera Agassiz, Index Univers., p. 82, 1846. 
Calodera Gould, Synops. Birds Austr., pt. 1, pi. (6), 
Jan. 1837. Type (by subsequent designation) 
Sharpe, Cat. Birds Brit. Mus., Vol. VI., p. 388, 
1881. .. .. •• •• •• .. C. maculata Gould. 
Calodera Mannerheim, Mem. Ac. Imp. Sci.. St. Petersb., Vol. I. (5), p. 499, Feb., 1831. 
Also spelt— 
CaUidera Agassiz, Index Univers., pp. 68-60, 1846. 
In an evolutionary scale this would be the most highly developed form of 
“ Chlamydera,'^ having diverged from the ancestral style of inornate form 
in developing a spotted plumage and a lilac napeband in both sexes. In 
“ cerviniventris ” the development is not in size, but rufous coloration under¬ 
neath and NO napeband at all. In “ nuchalis ” the rufous under-coloration 
has not been produced, but a larger size is reached and the male has a lilac 
napeband, but not the female. It is of course possible that the ancestral 
form was spotted and that in this group the spots are intensified, while in 
the others they have disappeared. 
Compared with Rogersornis, which I have diagnosed in fuU, this group 
is composed of smaller birds, and curiously enough has the widest distribution. 
The bill is shorter, stouter, broader, almost as broad as deep at the base, and 
the tip is less noticeably notched. 
The wing has the second primary longer than the seventh, the first shorter 
than the secondaries, the second about equal to the sixth. The tail-feathers 
are rather narrow. The front of the tarsus is heavily scutate; the inner and 
outer toes are subequal, the hind-toe and claw shorter than the middle toe and 
claw. 
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