A new species of Eutrombidium (Acari: Prostigmata) from Brazil ectoparasitic on Grylloidea, with a key to world larval species

Eutrombidium carajas sp. nov. (Acari: Microtrombidiidae: Eutrombidiinae) is described and illustrated from larvae ectoparasitic on Phalangopsis sp. (Orthoptera: Grylloidea: Phalangopsidae) from Brazil. Eutrombidium carajas sp. nov. belongs to the species group with large and deeply incised lateral coxala I, and coxalae II and III. A key to world larval species of Eutrombidium Verdun is provided.