Plate XX 



Fig. 1. The Wheat Bulb Worm, Meromyza americana, adult fly. Mag- 

 nified twelve diameters. 



Fig. 2. Larva of same. Magnified sixteen diameters. 



Fig. 3. Work of larva (a), larva (6), and pupa (c) of same. (Riley, 

 Rep. State Ent. Mo.) 



Fig. 4. Pupa of same, dorsal view. 



Fig. 5. Pupa of same enclosed in puparium. Magnified thirty diameters. 



Fig. 6. Cottonwood Dagger Caterpillar, Apatela populi. (Riley, Rep. 

 State Ent. Mo.) 



