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. SLINGERLAND 



ITHACA, N. Y. 

 PUBLISHED BY THE UNIVERSITY, 



