1916.] N \TURAL SCIENCES OF PHILADELPHIA. 549 



Plate XXXI.— Fig. 92. -Habit of Pterochionca bradleyi, with the wings and 

 middle leg removed. 

 Fig. 93. -Antenna of Pterochionea bradleyi. 

 Fig. 94. — Hypopygium of Pterochionea bradleyi; dorsal aspect of the right 



pleurite. 



Fig. 95. — Hypopygium of Molophilus fultonensis; ventral aspect of the 



ventral pleural hook. 



1'i-i. ( .H'>. — Hypopygium of M. fultonensis; lateral aspect. 



pj„ 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. 



