Oviposition by a strain of the Indian meal moth,Plodia interpunctella(Hübner), and by 2 strains of the almond moth,Ephestia cautella(Walker) was usually stimulated by the presence of moth rearing medium, peanuts, or dates and was influenced by the type of food. Moths taken from a specific food source laid most eggs. TheP. interpunctellaoriginated from peanuts, one strain of theE. cautellaoriginated from peanuts, and the other from dates. The possibility that the 2 strains ofE. cautellaare sibling species is discussed.