THE VICTORIAN NATURALIST. 



UPPER WfNC 



Ante cubital nervures 



Costa, _ ____L—r—T—\ 7 /' / / 



Sub casta 



Nodu 



LO\A'ER W1NC 



. -Nodus 



Pterosttgma 



■Sector principal. 

 Sector nodal 



'-Sector median 



Sector bref 



,-Pterostiqma 



In the classification usually adopted the group Odonata is 

 divided into three families, which are subdivided into seven sub- 

 families, according to the following table : — 



Family I. — Libellulid^e. Sub-family 



II. — yEsCHNID^. 



III. — AGRIONID/E. 



Libellulinse. 



Cordulinse. 



Gomphinse. 



Cordulegastrinse. 

 ^Eschninse. 



6. Calopteryginge. 



7. Agrioninse. 



The distinguishing characters of these families and sub-families 

 are as follow : — 



Wings dissimilar in shape. Triangles of 

 the anterior wings very different to 

 those of the posterior pair. Three 

 anal appendages in the male 



Eyes simple, without prolongation 



at the bottom(<m horde jjosterieur) 

 Eyes large, contiguous, having a 



kind of prolongation at the 



bottom 



Triangles of the wings almost alike, but 

 wings not alike. Three anal append- 

 ages in the male 



Eyes separated one from the other 

 Eyes almost touching ... 

 Eyes contiguous, very large 



I. LlBELEULIDyE. 



Libellulinse. 



2. Cordulinse. 



II.- 



-^ESCHNID/E. 



Gomphinse. 



Cordulegastrinse. 



^Eschninse. 



