none Chaetophthalmus similis; LEPIDOPTERAN-HOSTS; Nyctemera amica; TASMANIA-; Hobart, Sandy Bay; Lepidopteran host, prevalence in larvae Nyctemera amica; DIPTERAN-PARASITES; Chaetophthalmus similis; HYMENOPTERAN-PARASITES; Diolcogaster perniciosus; Prevalence; TASMANIA-; Hobart, Sandy Bay; Insect parasite prevalence, larvae Diolcogaster perniciosus; HYMENOPTERAN-PARASITES; Mesochorus; Hyperparasite record; LEPIDOPTERAN-HOSTS; Nyctemera amica; Prevalence in larvae; TASMANIA-; Hobart, Sandy Bay; Lepidopteran host & hyperparasitism by Mesochorus (Hymenoptera) Mesochorus; HYMENOPTERAN-HOSTS; Diolcogaster perniciosus; Hyperparasitism, Tasmania Nyctemera amica (White) (Lepidoptera: Arctiidae) larvae feeding on Senecio quadridentatus Labill. (Asteraceae) at Sandy Bay, Hobart, were collected and reared in the laboratory to observe parasitism. Two species of primary parasitoid were recovered: Diolcogaster perniciosus (Wilkinson) (Hymenoptera: Braconidae) and Chaetophthalmus similis (Walker) (Diptera: Tachinidae). Mean parasitism by the two species was 25% and 12% respectively. A hyperparasitoid, Mesochorus sp. (Hymenoptera: Ichneumonidae), was found in association with 27% of D. perniciosus broods. Life-history observations on N. amica are included.