Bui. 1223, U. S. Dept. of Agriculture. 



Plate II!. 



European Elm Scale. 



A, Antenna of first-stage larva. B, Antenna of second-stage male larva. C, Antenna of 

 second-stage female larva. D, Antenna of adult female. E, Quinquelocular type of pore. 

 F, Trilocular type of pore. G, Circular pore and cross-section of internal communicating 

 duct. H, Ventral view of tip of abdomen of adult female. /, Leg of adult female. 



