none The authors study trip to the Cevennes in France (Gard, 30, & Herault, 34) for the week 11 -- 20 april 1981 revealed some interesting observations on larval foodplants, dwarfs, predation and parasitism, and some general notes on butterfly abundance and behaviour. Nutrition; Diet; Evolution; Variation; Morphological variation; Parasites diseases and disorders; Parasites; Insect parasites; Hosts; Insect hosts; Ecology; Community structure; Land and freshwater zones; Palaearctic region; Europe Lepidoptera; France; Cevennes; Records for April 1981 & ecology Rhopalocera; Size variation; Dwarfs, adult records for 1981; Relative abundance, 1981; France Mellicta deione (Nymphalidae); Food plants; Oviposition records; Hymenopteran parasites; Apanteles melitearum; France Mellicta melitearum (Nymphalidae); Host parasite relationships; Synchronization of double brooded parasite; Apanteles melitearum (Hymenoptera); France Zerynthia polyxena (Papilionidae ); Anthocharis belia (Pieridae ); Food plants; Oviposition records; France Apanteles melitearum (Braconidae); Lepidopteran hosts; Mellicta deione; Host parasite relationships; Synchronization of double brooded parasite with; Single brooded host; Mellicta deione (Lepidoptera); France