AMERICAN DIPTERA. 



235 



PLATE XVI. 



Fig. 123. Tipula bella, terminal part of abdomen, lateral view, x 23. 



'' 124. " " ventral view of hypopygium with appendages removed. 



" 125. " " central vesicle (c. v.) and penis {p), left view. 



" 126. " " guard of penis {p. g.) and appendages attached to its base. 



" 127. " " apical appendages of left side, outer view. 



" 128. '' caloptera, distal half of abdomen, lateral view, x 10. 



'' 129. " " ventral view of hypopygium with appendages removed. 



" 130. " ;< dorsal view of hypopygium. 



" 131. " '* guard of penis {p. g.) and attached appendages. 



" 132 " truncorum, terminal part of abdomen, lateral view, x 10. 



" 133. " fallax, central vesicle (c. v.) and basal part of penis (p.). 



" 134. " truncorum, apical appendages of left side, outer view. 



" 135. " fallax, ventral view of hypopygium. 



" 136. " incisa, apical appendages of left side, outer view. 



'' 137. " fallax, apical appendages of left side, outer view. 



" 138. " " distal half of abdomen, lateral view, x 10. 



PLATE XVII. 



Fig. 139. Tipula angustipennis, abdomen, lateral view, x 5. 



" 140. " " middle and lower apical appendages, outer view. 



" 141. " dorsal view of hypopygium. 



" 142. " lateral view of hypopygium. 



" 143. " upper apical appendage of left side, outer view. 



" 144. " central vesicle (c. v.) and penis {p.), left side. 



" 145. " '' guard of penis, dorsal view. 



" 146. " " central vesicle (c. v.) and penis (p.), ventral view. 



" 147. " " ventral view of hypopygium. 



" 148. " '' v-shaped bar in roof of genital chamber lying be- 



tween posterior arms of central vesicle. 

 Fig. 149. Tipula angustipennis, terminal part of abdomen, lateral view, with left 

 side of eighth and ninth segments removed, x 15; an., anus; a. t., 

 anal tube or tenth segment; c. v., central vesicle; ej. d., ejacula- 

 tory duct; g. c, genital chamber; p., penis; p. g., guard of penis; 

 r., rectum. 



TEAN6. AM. ENT. SOC. XXX. 



AUGUST. 1904. 



