Bui. 273, U. S. Dept. of Agriculture. 



Plate V. 



Fig. 1.— Showing Standpipe, Merrimac, Mass. Arrow Points to Screen Trap 

 on Top. (Original.) 



Fig. 2.— Screen on Standpipe, Merrimac, Mass., at Close Range, where 141 

 Larv/e were Caught During May and June, 1914. (Original.) 



SCREEN TRAP FOR WIND-BLOWN GIPSY-MOTH LARV/E, MERRIMAC, 



MASS. 



