OCTOBER, 1905 



BULLETIN 233 



CORNELL UNIVERSITY 



AGRICULTURAL EXPERIMENT STATION OF 

 THE COLLEGE OF AGRICULTURE 



Department of Entomology 



TWO NEW SHADE-TREE PESTS 



SAWFLY LEAF-MINERS ON EUROPEAN 

 ELMS AND ALDER 



By M. V. SLINGERLAKD 



ITHACA. N. Y. 



PUBLISHED BY THE UNIVERSITY 



119 



