Plate XL VII 



Prairie Species 



Corn Syrphid Fly. Mesogramma poliium. Enlarged. 

 Larva of same. Enlarged. (Sanderson. Kep. Del. Exp. Sta.) 

 iSyrphid tiy, Syrpliiis americanus. (Metcalf, Bull. Ohio Biol. 



Surv. ) 

 Puparium of same. (Metealf. 1. e.) 

 Larva of same. (Metcalf. 1. c.) 

 Syrphid fly, Allograpta ohliqua. (Metealf. 1. c.) 

 Jjarva of same. (IMetealf, 1. e.) 



