TYPICAL INSECTS 



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wings flat over the body or extended laterally, and not erect 

 over the back like the butterflies, when at rest. They also 

 have, as a rule, thicker and heavier bodies than the butterflies. 

 They have thread-like or feathered antennae, while butter- 

 flies have feelers with thickened 

 or even knobby ends. Their 

 food is like the butterfly's. 



Moth - caterpillars generally 

 spin a silken case or cocoon 

 around themselves before going 

 into the chrysalis stage. Collect 

 some of the black and brown 

 woolly Tiger -caterpillars and 

 rear them in a cage till they 

 spin their cocoon. The silk 

 comes from glands within the 

 body and emerges near the 

 mouth. It is a liquid that quick- 

 ly hardens on exposure. To es- 

 cape from the cocoon when the 

 transformation is complete, the 

 moth dissolves the gum that 

 binds the fibres of the cocoon together and forces its way out. 



Examine a cocoon. Open it. Within you will find the 

 chrysalis and the last caterpillar coat. 



There are many harmful moths: tent-caterpillars, clothes- 

 moths, army -worms, cut -worms, codling -moths, gypsy- 

 moths, etc. 



The Beetles or Coleoptera (Sheath- winged) represent 

 another great order of insects. A good typical beetle is the 

 common June-" bug" (beetle). This is a common night- 



FIG. 60. Scales on a Moth's Wing. 

 ( Photomicrograph.) 



