1. DANILEVSKII, A.S. (1965) (JOHNSTON, J. transl.): Photoperiodism and seasonal development of insects. Oliver & Boyd, Edinburgh and London, p. 283.
2. FUKAYA, M. (1948): On the local races of the rice stem borer.Nogaku-Kenkyu, 37: 121?123 (in Japanese).
3. ISHIKURA, H. (1955): On the types of the seasonal prevalence of rice stem borer moth in Japan. Bull.Nat. Inst.Agric.Sci.Tokyo,5: 67?80.
4. IWAO, S. (1962): Studies on the phase variation and related phenomena in some Lepidopterous insects. Mem.Coll.Agric.,Kyoto Univ., 84: 1?80.
5. IWAO, S. (1963): Some behavioural changes associated with phase variation in the armyworm, LEUCANIA SEPARATA Walker. I.Reaction of larvae to mechanical stimuli. Jap. J.appl. Entom. Zool., 7: 125?131.