[Two filariae of the genus Eufilaria in Turdus merula; development in Culicoides nubeculosus (author's transl)].

Turdus merula from Nevers (France) is infected by two species of microfilariae which both evolve in eight days (26 degrees C) in Culicoides nubeculosus. We determine as Eufilaria delicata Supperer, 1958, the females with the longest microfilariae, the male with slightly unequal spicules and the largest infective larvae. We consider the species with the shorter microfilariae, males with more markedly unequal spicules and a relatively short infective larva as E. bartlettae n. sp. The female of this species is unknown. The identification of the infective larvae is provisional since it is based on the relative frequency of the two species. The infective larvae of Onchocercidae in birds which have been described as developing in Culicoides and simuliids (genera Splendidofilaria, Chandlerella and Eufilaria) and morphological similar but the caudal extremities of the first and third stages differ between the genera.