EXPERIMENT STATION BULLETINS. 687 



PLATE IV. 



1. Lecanium cornuparvum. — And piece of bark from which one of this 



species has been removed. Slightly enlarged. 



2. Lecanium caryae. — On elm, slightly enlarged. 



3. Lecanium caryae. — On peach, enlarged about twice. 



4. Lecanium caryae. — On blue beech, enlarged about three times. 

 5 ajid 6. Lecanium nigrofasciatum. — Enlarged. 



