ENExMIES OF PLANTS. 



291 



still oth(M-s form a leathery case and bury them- 

 selves in the oromul. Here they remain cjuiet 

 for a time, when the pupa-cases split open and 

 the adult forms emerge, lay their eggs, and thus 



FIG. 98. — NET FOR COLLECTING INSECTS. 



their life-cycle is completed, and the life-cycle 

 of another Qreneration is beeun. 



III. Apparatus Needed in Collecting* and Rear- 

 ing Insects. 



A few simple, inexpensive articles are all that is 

 necessary. Nets, cyanide bottles (Fig. 99 ), and a 

 few empty bottles will be needed in collecting. 



I. T/ic net may be made by bending a heavy 

 wire into a circle about a foot in diameter, turn- 

 ing the ends of the wire out, as shown in Fig. 

 98. For a handle an old broomstick may be 

 used. A hole should be made in the end by 

 burninof it with a hot iron rod or borine it with 

 a small bit. Now fasten the ends of the wire 

 firml)' into this hole with pegs or nails. Make 

 a cheese-cloth sack a yard long, round one cor- 



