List of Figures. 



FIG. PAGE 



28. — Anal appendages of Somatochlora arctica (male imago) . . 138 



29. — Anal appendages of Cordulia anea (male imago) . . . . 142 



30. — Nymph of Cordulia cenea . . . . . . . . . . . . 144 



31. — Anal appendages of Oxygastra ciirtisii (male imago) . . . . 149 



32. — Nymph of Gomphus vulgatissiunis .. .. .. ..154 



T^^^. — Nymph of Cordidegaster aiiiiulatus . . . . . . . . 161 



34. — Nymph of Aiiax iinperator . . . . . . . . . . 168 



35. — Nymph o{ Brachytron prate use .. .. .. .. ..174 



36. — Anal angle of hind-wings of ^Kschiia mixta and ^Esi/i/ia 



Juiicea (male).. .. .. .. .. .. ..180 



37. — Nymph of Calopteryx splendeiis . . . . . . . . . . 224 



38. — Anal appendages of Lestes diyas (male imago) . . . . 230 



39. — Anal appendages of Lestes sponsa (male imago) . . . . 234 



40. — Dorsal spot on first segment of abdomen of Lestes di-yas 



and Lestes sponsa . . . . . . . . . . . . 234 



41. — Nymph oi Erythromma iiaias .. .. .. .. 246 



42. — Antenna of nymph of Erythromma naias . . . . . . 247 



43. — J.Iask of Erythromma naias . . . . . . . . . . 248 



44. — Legs of nymph of Erythromma 7iaias . . . . . . . . 248 



45. — Caudal lamella of nymph of Erythromma naias . . . . 249 



46. — Spine on caudal lamella of nymph of Erythromma naias . . 250 



47. — Nymph of Pyrrhosoma nympliula . . . . . . . . 257 



48. — Anal appendages oi Agrion pidchellum (male imago).. .. 279 



49. — Anal appendages of Agrion puella (male imago) . . . . 285 



50. — Nymph of Agrion puella . . . . . . . . . . . . 287 



5 1- — Anal appendages of Agrion mercuriale (male imago).. .. 293 



52. — Anal appendages of Enallagma cyathigerum (male imago) . . 300 



53- — Mask of nymph of Enallagma cyathigerum . . . . . . 302 



54. — Caudal lamella of nymjih of Enallagma cyathigerum . . . . 303 



55. — Diagram of Dragonfly setting-board . . . . . . . . 324 



56. — Diagram illustrating method of setting Dragonfly . . . . 326 



57- — Dragonfly set and ready for cabinet. . . . . . . . . 327 



