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In the present paper, based on material from Brazil, we present a contribution to the taxonomy of the Neotropical two-winged Leptophlebiidae. The male imago of Perissophlebiodes Savage is described, in addition to a new species of Askola Peters from Amazonas. Askola emmerichi Domínguez, Molineri and Mariano, so far recorded from Venezuela, is reported from Brazil and compared to the new species herein described. Askola yanoman, sp. nov. can be separated from other species of the genus by the following combination of characters: (1) general colouration yellowish brown with areas washed with greyish brown; (2) dorsal portion of eyes brown, eyes meet on meson of head; (3) penis yellowish brown with darker margin, extending beyond the posterior margin of the styliger plate. [ABSTRACT FROM PUBLISHER]