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ELEMENTARY LESSONS ON INSECTS 



LA BORA TOR Y PROGRA M 

 A. Living Specimens. 



I. See the living insects in the dishes of stuff from the 

 pond, especially three small kinds that will be useful as 

 transparent objects for the microscope. Chase them around 

 the edges of the dish, and observe their manner of swimming: 



1. Damselfly nymphs, that swim by sculling with the 



Fig. 7. — A dish of water with floating algae, weeds, etc., dipped from the pond, a, a mayfly 

 nymph; b, a damselfly nymph; c, a midge larva: d, the flocculent dwelling tube of a smaller midge 

 larva; e, a young water strider (runs on the surface); /, a very small dragonfly nymph; g, a young 

 tadpole. 



