Hind wing of Aeshna juncea.

Wings of Boyeria irene. From Comstock (fig. 237) The wings of insects,
, Ithaca, N.Y., (1918)
[1].

Wings of Anax junius. From Comstock (fig. 236) The wings of insects,
, Ithaca, N.Y., (1918)
[1].

Fore wing of dragonfly Aeshna juncea.