334 SCHOOL EQUIPMENT AND ITS MANAGEMENT. 



without difficulty by turning the contents out on to a dish 

 from time to time. The opportunity should be used, of 

 course, to point out the structural differences in all three 

 stages larva, pupa, imago observable externally between 

 beetle and butterfly, and these stages should be drawn. 

 Care should be taken not to allow the adult beetles to 

 escape. 



A third type of life-history may be followed in the crane 

 fly or " daddy-long-legs." The larvae of these may be 



Fig. 177. Cage for the pro 

 tection of Caterpillars 

 reared out of doors. 



Fig. 178. Cage for rearing of 

 Insects indoors. 



found in old pastures and in cornfields feeding on roots of 

 grasses and cereals. If got in spring they may be kept 

 amongst soil and the experiment tried of growing oats 

 therein. It will be found that they feed upon the roots 

 of the growing corn. Endeavour to complete the life- 

 history by keeping them supplied with food grass and 

 corn roots. 



