Twenty-one species of non-muscoid Diptera (Psychodidae, Phoridae, Sphaeroceridae, Ephydridae, Milichiidae, Chloropidae) were bred from dead snails, Achatina fulica, in West Malaysia, and four species from the same habitat in Northern Thailand. Information is given on the breeding sites, pattern of occurrence, development time, hymenopteran parasitoids, and medical and veterinary importance of the species.
