El género Cresera Schaus, 1894 consta de 12 especies, 8 de las cuales ocurren en Perú. Se proporciona una diagnosis de reconocimiento de las especies en base a los caracteres de coloración de las alas, dándose a conocer los patrones de distribuciones geográficas en el Perú.

Two new species of Homalotrichus Solier, 1849 are described from the Peruvian highlands: H. yana sp. nov. (Cuzco and Junin) and H. shapra sp. nov. (Cajamarca). Photographs and drawings of the major diagnostic characters are provided for the new species. This contribution confirms the occurrence of the genus in Peru.

A new species of the genus Piestus Gravenhorst is described from Peru, P. chullachaqui sp. nov. (Cuzco). Photographs and drawings of the major diagnostic characters are provided. A key to Piestus species is modified to include the new species. New records are provided for Piestus angularis Fauvel, Piestus bicornis (Olivier), Piestus fronticornis (Dalman), Piestus lacordairei Laporte, Piestus longipennis (Fauvel), Piestus mexicanus Laporte, Piestus minutus Erichson, Piestus pennicornis Fauvel, Piestus spinosus (Fabricius), Piestus sulcatus Gravenhorst, Piestus surrufus Caron et al. and Piestus validus Sharp. Cladistic analysis is made to know the relationship of the P. chullachaqui sp. nov. within Piestus.

A new species of Megarthrus Curtis is described from the Eastern slopes of the Andes in southeastern Peru (Department of Cuzco). Major diagnostic features are photographed and illustrated, and COI molecular barcode is given.

Elmas gorky Rodríguez et al. new species, is described from the department of Madre de Dios in southeastern Peru. Major diagnostic features are photographed and illustrated. New records are provided for Elmas gigas Ashe & Chatzimanolis, Elmas lescheni Ashe & Chatzimanolis and Elmas strigella (Bernhauer).