'*"& 



REPORT ON THEy 



..*** 



" . A o v " 



SPRUCE BUDWOR 



BY 



M. W. BLACKMAN, Ph. D., 



Professor of Entomology, 



New York State College of Forestry, Syracuse University 



Investigations Carried On and Report Published 



BY THE 



MAINE FORESTRY DEPARTMENT 



IN COOPERATION WITH THE 



Forestry Department, University of Maine 



AND THE 



Maine Agricultural Experiment Station 



1919 



