PASSERIFORMES. 
It is a subject worthy of the attention of the younger ornithologists, and the 
explorations of Captain S. A. White in South Australia have manifested many 
instances of habitat-distribution such as can be used as exemplars, and the Mallee 
forms constitute an easily accessible study, especially in connection with the 
forest or coastal races of the same species. 
It had better be explained here that in connection with this Order I 
purpose to restrict the synonymy, so that the very numerous (and valuable) 
references which occur in the Emu, V ictorian Naturalist, etc., will not all be quoted. 
Any peculiarly interesting item will, I hope, be fully acknowledged, but the 
citation of the names of all the workers alone would occupy too much space. 
Also in most cases where a long article occurs only a condensed account will 
appear, but the reference will be given so that the reader may be able to study 
the article further at first hand. As regards scientific quotations, these will also 
be curtailed so that most will be worthy of reference. In the past the many 
pages of synonymy have been judged to account for the “ painstaking effort ” 
of the author instead of as a waste of paper. I have given a resume of the 
scientific subspecific splitting as I find that such is desired, but I group all the 
subspecies under a specific heading. In this group the varied climatic conditions 
favour many subspecies, and further many of the species show great plasticity so 
that many well differentiated subspecies occur. It is as well to point out to the 
field worker that the subspecies should be recognised, as very probably such 
show differentiated habits and life-history. 
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