| abstract | A total of 36 larvae were captured parasitizing 4 species of Tettigoniidae (Orthoptera, Ensifera) and two phasmids (Phasmatodea) in the Reserva Biologica Alberto Manuel Brenes in Costa Rica. Here, we report the second capture of two species of mites since their original descriptions Leptus nikanori Haitlinger, 2000 (Erythraeidae) from Costa Rica and Charletonia domawiti Haitlinger, 2004 (Erythraeidae) from Brazil and each only known from a single specimen. We also describe and illustrate Charletonia salazari sp. nov. captured parasitizing Scopiorinus mucronatus (Saussure & Pictet, 1898) (Orthoptera, Tettigoniidae, Pseudophyllinae). A key for the species of the genus Charletonia from the New World is provided. |