Description of the immature stages of Discobola annulata (Linnaeus, 1758) and D. margarita Alexander, 1924 (Diptera, Limoniidae) with notes in their biology

After a summary on the biology of Discobola , a general description is presented of the larva and pupa of the genus, followed by a more specific description of the larva and pupa of D. annulata (Linnaeus, 1758) and, for the first time, D. margarita Alexander, 1924. D. annulata was reared  from decaying wood blocks of Alnus , Populus and Betula and from mold under the bark of Abies and Picea . The larvae of D. margarita develop inside fruiting bodies of Piptoporus and in decaying fallen wood blocks of Ulmus , Betula and Quercus . A key to larva and pupa of the two species is provided.