178 



THE BIOLOGY OF INSECTS 



differ from their adults less than a caterpillar differs from a 

 butterfly while others differ much more. The grub of a 

 ground-beetle (Chlaenius), Fig. 47, has the terga of the 

 segments strongly chitinised so that the body is well 

 armoured, and its feelers and legs are relatively long, while 



Fig. 48. — Chafer (A?iomala bengalensis) , India, a, larva (side 

 view); b, female. X 3. From T. B. Fletcher {_Bidl. 89, Agr. Res. 

 Inst. Pusa, 1919). 



the mandibles are powerful and provided with strong sharp 

 teeth ; such a grub feeds, like its parent beetle, on weaker 

 insects which it captures and devours. The well-known 

 '* wireworm," or larva of a click-beetle (Agriotes), has also 

 a strongly armoured body ; it is, however, narrow and 



