OF SOUTHERN AUSTRALIA. 



109 



environs of your " lease " would mean the cultivation of 

 insect enemies a thousandfold, and to eventually assign it all 

 to them. Vegetable and mineral poisons solely used in the 

 subjugation of noxious insects prove enormously expensive 

 when compared with the birds' labour charge. 



Chestnut-backed Babbling-Thrush. 



This species associates in small flocks, or injpairs, upon the 

 ground, in the vicinity of gravel beds where these are present. 

 In April little flocks are seen of some 15 to 20 birds. 



