Abstract
The male, female and puparium are described for Sarcofahrtiopsis cupendipe sp. nov., whose larvae live in the roosts of disk-winged bats (Thyroptera species). Sarcofahrtiopsis cupendipe and S. thyropteronthos Pape, Dechmann & Vonhof are both associated with the faeces of the disk-winged bat and are the only species of Sarcofahrtiopsis with wing vein R1 fully setose dorsally and a short parameral apodeme in the male terminalia. In addition, the female terminalia of S. cuneata (Townsend) is redescribed.