• Stehr, G.
  Forest Insect Laboratory, Ontario
  

This paper describes a method of rearing the spruce budworm, choristoneura fumiferana (Clem.) under laboratory conditions. The development of such a method has been necessary as a preliminary step in a program of investigations into the genetics of the spruce budworm. The method therefore attempts to satisfy primarily the requirements of genetical studies but, since these are as exacting as may be necessary for any biological investigation, a wider applicability maybe anticipated.