1. ALEXANDER, N. J. and FAHRENBACH, W. H. (1969), Fine structure of endocrine hindgut cells of a lepidopteran, Ostrinia nubilalis (Hübn.), Z. Zeilforsch, 94, 337–345.
2. ALTMANN, P. L. and DITTMER, D. S. (eds.) (1968), Nutrient requirements and utilization: insects, In: Metabolism, Fedn Am. Soc. exp. Biol., Bethseda, pp. 148–167.
3. ANDERSON, E. and HARVEY, W. R. (1966), Active transport by the Cecropia midgut. 2. Fine structure of the midgut epithelium, J. Cell Biol., 31, 107–134.
4. AUCLAIR, J. L. (1969), Nutrition of plant-sucking insects on chemically defined diets, Entomologia exp. appl., 12, 623–641.
5. BACCETTI, B. (1960), Ricerche sull’ultrastruttura dell’intestino degli insetti. I. L’ileo di un Ortottero adulto. II. La cellula epiteliale del mesentero in un Ortottero, un Coleottero e un Dittero adulti, Redia, 45, 263–278