THE BOX ELDER GALL-FLY 



261 



The Box Elder Gall-fly. This is a very minute, two-winged 

 fly (Ceddomyia negundinis Gill) which lays eggs on the leaves 



FIG. 261. Box-elder bug; male, female, and nymphs. (Lugger.) 



of the box elder. As a result the leaves form unsightly galls (Fig. 

 262) which interfere with the proper functioning of the foliage. 

 Tiny maggots are found inside of the galls. Maple leaves (Fig. 



