LADYBIRDS. 121 



and the figure shows the appearance of their six- 

 footed slaty and orange-spotted grubs. Both as 

 Beetles and grubs they feed on Aphides of various 

 kinds, and are of such great service in keeping 

 down the Hop Aphis that they should never, on any 

 account, be destroyed. They are best known with us 

 for their serviceableness in keeping down Aphides or 

 Plant Lice ; but it is not only limited to this, and in 

 other countries two distinct species are of great 

 service in lessening amount of presence of the so- 

 called "Australian IBug," the fluted or Woolly Scale- 

 insect. 



