ODONATA. 



These insects are carnivorous both as young and adults. The nymphs are 

 aquatic and notable on account of the greatly developed under lip, which 

 has become a grasping organ for securing their prey. The adults are famil- 

 iarly known as "dragonflies" "darning needles" "snake feeders or doctors." 

 There are seven families the last two being sometimes distinguished as dam- 

 selflies 



SYNOPSIS OF FAMILIES. 



Agrionidae: eyes hemispherical. Calopterygidae: five or more antecubitals. 



Libellulidae: antecubitals corresponding. Cordulidae: eyes" tubercled be- 

 hind. 



omphidae. >Cschnidae: eyes approximate. Corduligasteridae: touching 

 at but a single point. 



Fig-ure 352. Diagram of the wing of Odo- 

 nata. a. aiculus. n. node. n.S. nodal sec- P'iguie 353. Diagram of the venation of 

 tor. s. stigma, t. triangle. fossil dragonflies. 



Eelona odiosa — Libellula. 



saturata — Libellula. 

 Diplax corrupta (Hag.) 



flavocosta — mandida. 



haqeni Cal. 



mandida Han. 



semicincta (Say.) 

 Lepetnim corruota — Diplax. 



forensis — Libellula. 

 Libellula forensis Hag. 



longipennis — Pachydiplax. 



lydia Dru. 



odiosa Hag. 



LIBELLULID/E. 



pulchella Dru. 



saturata Uhl. 



semicincta — Diplax. 



simplicicollis — Mesothemis. 



subornata Hag. 

 Mesothemis collocata — simplicicollis. 



illcta Haq. 



longipennis — Pachydiplax. 



simplicicollis (Say.) 

 Platytheniis subornata — Libellula. 



triipaciilata — Libellula. 

 Pachydiplax longipennis Burm. 



332 



