Two new species of the subgenus Forcipomyia (Metaforcipomyia), from Argentina, F. (M. ) williamsi and F. (M.) galliarii,are described and illustrated. In addition, F. (M.) cerifera Saunders, 1956 is redescribed and first recorded for Argentina.Instituto de Limnología "Dr. Raúl A. Ringuelet