OHIO EXPERIMENT STATION: BULLETIN 332 



PLATE LIV 



THE EUROPEAN ELM SCALE 



(Gossyparia ulmi) 



Fig. 1. Adult female insects in position in their protecting waxy nests. 

 Slightly enlarged. 



Fig. 2. The European elm scale in late spring. The louse-like objecl 

 fire the developing females and the cottony masses are the cocoons of the iru 



Fig. 3. An elm tree/Marietta, Ohio, in a dying condition from an infe* 

 tion of the European elm scale. 



