514 PROCEEDINGS OF THE ACADEMY OF [Sept., 



Fig. 80. — Penis-guard of T. tuscarora; ventral aspect. 



Fig. 81. — Penis-guard of T. rangiferina; lateral aspect. 



Fig. 82. — Gonapophyses of T. morrisoni; ventral aspect. 



Fig. 83. — ^Ventro-caudal margin of the ninth tergite of T. morrisoni; caudal 



aspect. 

 Fig. 84. — Ovipositor of T. mandan; lateral aspect. 91 = ninth tergite; 



9s = ninth sternite. 

 Fig. 85. — Ovipositor of T. piliceps; dorsal aspect. 

 Fig. 86.— Ovipositor of T. imperfecta; dorsal aspect. 

 Fig. 87. — Ovipositor of T. parshleyi; dorsal aspect. 



