Plate LXIX 



Tltoracic and Ahd(>}ni)Kil Strucfurcs of Adults 



Fi«'. 140. Argia tihmlis, female, mesostiginal plates. 



Fig. 141. Argia sedula, female, mesostigmal plates. 



Fig. 142. xlrgia violacea, female, mesostiginal plates. 



Fig. 143. Argia fumipennis, male, anal appendages. 



Fig. 144. The same, male, anal appendages. 



Fig. 145. Argia violacea, male, anal appendages. 



Fig. 146. The same, male, anal ai)pendages. 



Fig. 147. Argia apicalis, male, ninth sternujn. 



Fig. 148. Argia fumipennis, female, mesostiginal i)lates. 



Fig. 149. Argia sedula, male, anal appendages. 



Fig. 150. The! same, male, anal appendages. 



Fig. 151. Argia apicalis, male, anal appendages. 



Fig. 152. The same, male, anal appendages. 



Fig. 153. The same, female, mesostiginal plates. 



Fig. 154. Argia moesfa putrida, female, mesostiginal plates. 



Fig. 155. Argia iihialis, male, anal appendages. 



Fig. 156. The same, male, anal appendages. 



Fig. 157. Argia moesfa puirida, male, anal appendages. 



Fig. 158. The same, male, aiinl appendages. 



