February, ’18] 
JOURNAL OF ECONOMIC ENTOMOLOGY 
Plate 4 
2 
1. 10 large fly traps on one-quarter acre field of onions. (Original) 
2. Portion of three-acre field shown in Fig. 2 (Plate 3), photographed in August. 
This field was injured to the extent of 75%. The area in the foreground shows a 
higher percentage. (Original) 
