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A new species of Pheraeus Godman, 1900, P. guandu Saraiva, Carneiro, Mielke & Casagrande sp. nov., restricted to the Rio Doce Valley (Espírito Santo and Minas Gerais, southeast Brazil) is described. Adults of the new species are illustrated and compared with phenotypically closest species, Pheraeus argynnis (Plötz, 1884), together with the diagnostic characters present in the male and female genitalia. This new species is here solely described because it is known to occur in a restricted region crossed by the Rio Doce. This region has been extensively transformed in recent decades by agriculture, livestock, construction of hydroelectric and tailing dams, and more recently by a dam failure, thus potentially impacting the habitat of this species.

A new species of Thespieus Godman, 1900 (Hesperiidae, Hesperiini), Thespieus maacki sp. nov., is described from high altitude grasslands on Aracatuba Mountain peak, Tijucas do Sul, Parana, Brazil. Similar habitats surrounding the type locality were also sampled, but this species was never recorded elsewhere. The most similar species Thespieus caraca Evans, 1955 is also illustrated and compared, in order to provide clear diagnostic characters for species identification.

A new species of Atrytonopsis is described from the western and central Mexican states of Michoacan, Mexico and Sinaloa. Preliminary distributional and biological notes are provided, as well as a discussion of this new species' placement within the genus Atrytonopsis.

Stinga Evans, 1955, has been considered monotypic since its description despite geographical variation that has not been elucidated. The variation of Stinga morrisoni (W. H. Edwards, 1878) described and figured here includes a range of superficial phenotypes segregated by a combination of geography and elevation, but united by a common genital morphology of both sexes. In addition, a second species of the genus occurring in southern Mexico (Tlaxcala, Puebla and Oaxaca), with different genitalia and superficial traits outside the range of variation seen in S. morrisoni, is described and named as a new species.