Plate LXX 

 Thoracic and Abdominal Structures of Adults 



Pig. 159. Nehalennia Irene, male, anal appendages. 



Fig. 160. The same, male, anal appendages. 



Fig. 161. Enallagma hageni, male, anal appendages. 



Fig. 162. The same, male, anal appendages. 



Fig. 163. Ischnura posita, female, mesostigmal plates. 



Fig. 164. Anomalagrion hastatum, female, mesostigmal plates. 



Fig. 165. Enallagma aspersum, male, ninth sternum. 



Fig. 166. Anomalagrion hastatum, male, anal appendages. 



Fig. 167. The same, male, anal appendages. 



Fig. 168. Ischnura verticalis male, anal appendages. 



Fig. 169. Enallagma doubledayi, male, right superior appen- 

 dage seen from the left and above. 



Fig. 170. Chromagrion condition, female, mesostigmal plates 

 and dorsum of prothorax. 



Fig. 171. Ischnura posita, male, ninth sternum. 



Fig. 172. Anomalagrion hastatum, male, ninth sternum. 



Fig. 173. Ischnura posita, male, anal appendages. 



Fig. 174. Amphiagrion saucium, male, anal appendages. 



Fi^. 175. Enallagma doubledayi, male, anal appendages. 



Fig. 176. Enallagma carunculaium, male, right superior ap- 

 pendage seen from the left and above. 



Fig. 177. Ischnura posita, male, anal appendages. 



Fig. 178. Amphiagrion saucium, male, anal appendages. 



Fig. 179. Enallagma civile, male, right superior appendage 

 seen from the left and above. 



Fig. 180. Ischnura verticalis, female, mesostigmal plates. 



Fig. 181. Amphiagrion saucium, female, mesostigmal plates. 



Fig. 182. Nehalennia Irene, female, mesostigmal plates. 



Fig. 183. The same, male, ninth abdominal sternum. 



