20 



TWO ONION MAGGOTS. 



nth Other infested plants were obtained from a field near the 

 Experiment Station. These two sets were placed in the same 



Fig. 12. — The common onion maggot. Phorbia ceparum. 



breeding- jar by an assistant, and in September two different 

 species of flies, both enemies of onions, issued from the pupa- 

 ria. One. the common Onion Magg^ot, Phorbia ceparum, 

 belonging to the family Anthoniyidae, is shown in Fig. 12. 

 The other, an entirely different fly, Trifo.va iiexa, belonging 

 to the Ortalidac, is shown in Fig. 13. 



The common onion maggot fly lays its eggs early in the 

 spring on the stems or leaves of the onion, close to the ground. 



Fig. 13. — Tritoxa flexa, found in onions this season, much enlarged. (Author's 



ilhistration. ) 



The larvae hatching from the eggs work in the bulb, causing 

 the plant to wilt and die, the bulb decaying. Young plants 



