Two new species of parasitoids, Eibesfeldtphora trifurcata and Eibesfeldtphora inornata, are described. Both species were collected in Brazil. A new key is provided and illustrated for the twenty one known species.
Algumas espécies de forídeos do gênero Neodohrniphora Malloch, 1914 ovopositam na cabeça das operárias de Atta sexdens rubropilosa Forel, 1908 durante o forrageamento (Tonhasca 1996, Bragança et al. 1998, Brown 2001. A freqüência do parasitoidismo desta saúva por espécies de Neodohrniphora spp. é normalmente baixa (cerca de 2%) (Bragança et al. 1998). Todavia, os ataques destas moscas, em campo e laboratório, alteram o ritmo de forrageamento das operárias, reduzindo o número e tamanho dos indivíduos presentes nas trilhas e aumentando o abandono de fragmentos vegetais (Tonhasca 1996, Bragança et al. 1998 This suggests that these two Neodohrniphora species are not active in the field during the night (darkness) and that visual stimulus could be an essential component to the location and recognition of the host.
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