5o4 



THE GUIDE TO NATURE. 



.YAID 

 THE LENS 



AX INTERESTING LENS STUDY OF WING OF CORYDALIS. 

 Notice the peculiar bracing in the upper part. What can be the purpose of the trans- 



.: lucent spots? 



IWFKKST1NU FORMS OF INSECT 

 AXTEXNAE. 



Between or in front of the eyes of 

 insects are two slender, club-shaped or 

 feathery extensions known to the scien- 

 tist as antennae, or possibly as feelers. 

 These are mainly organs of feeling" 

 but, in some insects, also hear the 

 nerves for smelling or even for hear- 

 ing, and it has been stated by Graber 

 that in Longicorn beetles these anten- 



nae are used for balancing when the 

 insect is walking along a slender twig, 

 much the same as a tight rope dancer 

 uses a balancing pole. 



These antennae are of many forms 

 well worth careful examination and 

 study. The differences in shape j.nd 

 structure are often cited as one of the 

 methods of distinguishing a moth from 

 a butterfly, in the moth (Fig. i) the 

 antennae are branching and feather- 



