128 



Days 



10° 



JOURNAL OF ECONOMIC ENTOMOLOGY 

 20° 



[Vol. 3 

 30° C. 



Fig. 20. Relation of temperature to tlie time of the pupal stage of Corpo- 

 capsa pomonella: — . . . according to Jenne, Arkansas, 1908; g — 

 according to Gillette, Colorado, 1901; mj — according to Melander and Jenne, 

 Washington, 1904; xs — from author's data. New Hampshire, 190G-08 

 (original). 



