Bui. 245, U. S. Dept. of Agriculture. 



Plate I. 



Destruction of Fly Larv/e in Horse Manure. 



Fig. 1. — Type of cage used for catching flies from treated manure piles. Fig. 2. — Settled and finely 

 divided condition of an untreated pile, heavily infested with maggots. Fig. 3. — A hellebore-treated 

 pile of same source and volume as figure 2. Hellebore, by preventing growth of fly maggots, 

 prevented the disintegration of the heap. (Original.) 



