FAMILY CORDUUDy^ 



With this group we approach the large family LibelluHdae, 

 the Cordulidae being distinguished by possessing a single tubercle 

 on the hind border of each eye, and in fact these insects are by 

 most recent authors considered to be simply a subfamily of the 

 LibelluHdae, which they resemble in most respects. They are 

 medium sized, or large dragon-flies in which the wings are fre- 

 quently banded with brown, although in some forms the dark 

 markings occur only at the base of the wings, and some are entirely 

 clear. The body colors may be metallic or sordid. These insects, 

 according to Kellicott, oviposit by flying close to the surface of 

 the water striking the water occasionally with the tip of the ab- 

 domen to wash off the eggs. 



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