A nova espécie de Cocoelidia DeLong, 1953, C. prolata sp. nov., é descrita de Cacaulândia (Ariquemes), Rondônia, Brasil.

A new species of Cocoelidia DeLong, 1953, C. prolata sp. nov., is described from Cacaulândia (Ariquemes), Rondônia State, Brazil.

Three new species of Aglaenita Spinola, 1850 are described: Aglaenita similis sp. nov., Aglaenita elegans sp. nov. and Aglaenita dubia sp. nov. from Amazonas State, Mato Grosso State and Rio de Janeiro State, Brazil, respectively. Illustrations and a key for the species and new occurrences for A. bipunctata Spinola, 1850 are presented. The three new species are similar among them, even so they can be distinguished by the aspect of the male genitalia, mainly by the aedeagus and pygofer.

In the present study five new species of Biza are presented: B. castanea sp. nov., B. ocellata sp. nov., B. maculata sp. nov., B. trimaculata (all from Brazil, Amazonas State) and B. similis sp. nov. (from Brazil, Mato Grosso State). The new species of Biza can be distinguished by the aspect of the male genitalia, mainly by the shape of the aedeagus, the presence or absence of process in the aedeagus and shape of pygofer.

A new species of Xenocoelidia Kramer, 1959 is described from Rio de Janeiro State, Brazil. This species can be distinguished by the aspect of the male genitalia, mainly by the aedeagus shape.

Two new species of Chinaia Bruner & Metcalf, 1934 are described: Chinaia bidentata sp. nov. (Brazil, Paraná) and Chinaia rubra sp. nov. (Brazil, Amazonas). The new species can be distinguished by the aspect of the male genitalia, mainly by the shape of aedeagus and pygofer. In addition, is presented a key to males of Chinaia.

Three new species of Ladoffa Young, 1977 are described: L. rubronigra sp. n. (North Brazil and Guyana), L. isabellina sp. n. (North Brazil), and L. trifasciata sp. n. (Panama). They are similar to the other species of the genus in the general aspect, mainly with regards to the coloration. However, they can be distinguished by the aspect of the male genitalia.

A new species of Coelidiana Oman, 1936 is described from Sinop, Mato Grosso, Brazil. The new species can be distinguished by the aspect of the male genitalia, mainly by the aedeagus apex.

The new species can be distinguished by the male genitalia, mainly by the aedeagus process that present each rami with a apical bifurcation.

Two new species of Dasmeusa Melichar, 1926 are descri bed and illustrated: D. basseti sp.n. from Guyana and D. isabellina sp.n. from Brazil, Pará.