CONTENTS. 



Chap. 



I. — [M'RODUCnON 



II. — Life Hi.storv 

 III. — Classification .. 

 I\'.— Thf Nymph 

 V. — I'HE Imago 

 VI. — Genera and Species. 



1. Lc'iiiorr/iiiiia dubi'i 



2. Syniipctriini sti iolatiini .. 



3. Sympetriuii foiiscolombii 



4. Sympetriini fliweolum . . 

 ^. Syuipetritm ^aiif^iiincuin 



6. Sympi'truin seofnum 



7. Libclliila dtpressa 



8. Libelhila qitadriuiacitlata 



9. Libelhila fulva . . 



10. OrthctriDit cixrulescens . . 



11. Orthetrum canccllntum 



12. So/natochlora uiitallica 



13. Soiiiatochlora airtica 



14. Cordulia ceiiea . . 



15. Oxygaxtra ciirtisii 



16. Gomplius viilgaiissimiis 



17. Corduligaster aiiiiiilahis 



18. A flax impenitor . . 



19. Brachytron prate use 



20. yEschna tnixta . . 



21. ^schna ccerulea 



22. ^Eschiia /u/icea . . 



23. ^-Kschiia cyanea . . 



24. ^Eschna grand is 



45 



63 

 69 



77 

 <Sl 



«7 

 93 

 100 

 107 

 119 

 122 

 126 

 130 

 137 

 140 



147 

 151 

 •57 

 I '^3 

 170 



177 

 183 

 189 

 190 

 20^ 



