1916.] NATURAI. SCIENCES OF PHILADELPHIA. 549 
Plate XXXI. — Fig. 92. — Habit of Pterochionea hradleyi, with the wings and 
middle leg removed. 
Fig. 93. — Antenna of Pterochionea hradleyi. 
Fig. 94. — Hypopygium of Pterochionea hradleyi; dorsal aspect of the right 
pleurite. 
Fig. 95. — Hypopygium of Molophilns fuUonensis; ventral aspect of the 
ventral pleural hook. 
Fig. 96. — Hypopygium of M. fuUonensis; lateral aspect. 
Fig. 97. — Hypopygium of Erioptera laticeps; dorsal aspect; 9t = ninth 
tergite; pi = ninth pleurite. 
Fig. 98. — Hypopygium of E. nyctops; dorsal aspect; a, b, c = pleural 
appendages. 
