Dragon-FIiea 



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 Calopterygidc^ 



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 Gompht'dce 



Eyes touching at a single point Family Cordulegasterid(Z 



Eyes touching for some distance Family /Eschnidce 



4 — Eyes with tubercles behind Family Cordulidx 



Eyes not tubercled behind Family Libellulidce 



ito». 



