THE BIRDS OF AUSTRALIA. 
Key to the Species. 
A. Tarsus more than 12 inches in length. 
a'. Feathers of fore-neck black in contrast 
to the under-surface D. n. Tiovm-hollandice, p. 3. 
h'. Feathers of fore-neck white like 
remainder of the under-surface . . D. n. diemenensis, p. 14. 
B. Tarsus less than 12 inchesin length. 
c'. Feathers of fore-neck long and blackish 
in colour . . . . . . . . D. parvuluSy p. 19. 
d'. Feathers of fore-neck long and whitish 
in colour . . . . , . . . D. minor, p. 23. 
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