GENERAL ZOOLOGY 



Fig. 15.27. Odonata. A, naiad of a drae;onflv; in 

 this immature stas;e the insect breathes by means of 

 tracheal gills lining; the rectum. B and C, two views 

 of an adult dragonfly; note the large, many-faceted 

 eves, the stout mandibles, and the efficient wings. 

 (Photographs bv Charles Walcott.) 



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