108 Beetles [CH. 
flea. If we succeed in catching one of these hopping 
insects we shall find that it has two pairs of wings 
and is therefore not a fly. The outer wings are 
hard and protective, and from this we shall decide 
that it is a beetle. The name turnip flea beetle is the 
most appropriate as it tells us that the insect is a beetle 
Fig. 31a. A centipede. 
Fig. 316. Millipedes. 
and also at the same time reminds us of its hopping 
powers. 
In spite of its small size this beetle is capable 
of doing enormous damage on account of its numbers 
and power of multiplying. Under favourable conditions 
it is possible for six generations to hatch out in a 
single season. It attacks the plant just at the time 
