Dragon- Flies 



I — Wings with at least five cross veins between the first and 

 second longitudinal veins and before the first break in the 

 wing (antecubitals) Family Calopterygidcz 



Wings with but two such cross veins Family Agrionidce 



2 — Antecubitals of the first and second rows not meeting except 

 at base of wing 3 



Antecubitals of first and second rows running into each 

 other 4 



3 — Eyes wide apart Family Gomphidce 



Eyes touching at a single point Family Cordulegastertdce 



Eyes touching for some distance Family Aischnidce 



4 — Eyes with tubercles behind Family Cordulidce 



Eyes not tubercled behind Family Libellulidce 



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