Genus— HETEROSCENES. 
Heteroscenes Cabanis und Heine, Mus. Hein., Vol. IV., 
p. 26, 1864 . . . . . . . . . . . . . . l^pe H. pallidus. 
This monot3rpic genus is confined to Australia and is somewhat intermediate 
between Cuculus and Cacomantis. 
In coloration it is dissimilar from either, the immature plumage being quite 
peculiar while the tail is proportionately longer. 
It is difficult without anatomical assistance to suggest the derivation of this 
group, whether from Cacomantis or Cuculus. Its pecuharities are best indicated 
by the usage of the generic name Cabanis and Heine allotted to it. 
It is noteworthy that here also Australia appears to have an endemic genus, 
while the true Cuculus appears as a visitor from the north. Cacomantis is 
represented in a somewhat similar manner, and the Bronze Cuckoos show 
pecuharities also. 
As Cuckoos are so plentiful in Australia a comparative examination of the 
nesthngs of the species would provide much of great value, and assist in the 
elucidation of the relationships and development of the groups. Thus it might 
be suggested that the nestling of the present group and the nestling of true 
Cuculus might show little differences, whereas there might be more between this 
and Cacomantis. It is just as probable that the reverse might be seen, as this 
may have really altered more, though superficially so httle difference can be seen. 
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