236 



R. E. SNODGKAS8. 



PLATE XVIII. 



Fig. 150. Tipida triritta, central vesicle (c. v.) and penis {p.), left side. 

 " 151. " ■' guard of penis, left side. 



" 152. " " ventral view of bent bar lying between posterior arms 



of central vesicle. 

 " 153. Tipula trivitta, apical appendages of left side, outer view. 

 ■' 154. " cognata, left view of hypopygium ; m, intersegmental membrane 



between eighth segment and hypopygium. 



155. Tipula cognata, ventral view of hypopygium with appendages removed. 



156. " spectabilis, tergum of hypopygium, dorsal view. 



157. " cognata, apical appendHges of left side, outer view. 



158. " spectabilis, guard of penis, left side. 



159. " " apical ajjpendage of left side, outer view. 



160. " ■' distal half of abdomen, lateral view, x 10. 



161. " " ventral view of hypopygium. 



