STATE OF ILLINOIS 

 DEPARTMENT OF REGISTRATION AND EDUCATION 



DIVISION OF THE 

 NATURAL HISTORY SURVEY 



STEPHEN A. FORBES. Chief 



Vol. XVI. BULLETIN Articles V. &- VI. 



An Experimental Investigation of the 

 Relations of the Codling Moth to 

 Weather and Climate 



By VICTOR E. SHELFORD 



A Study of the Catalase Content 

 of Codling Moth Larvae 



By C. S. SPOONER 



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PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS 



URBANA. ILLINOIS 

 March. 1927 



