A new species of larval neothrombids, Dasitrombium clarissae (Acari: Prostigmata: Neothrombiidae), parasitic on grasshoppers from Nicaragua is described. Larvae have the following diagnostic features: Ta I 110-114, Ti I 48-52, Ta II 102-106, Ti II 44-48, Ip 1020-1054, ratio L/W 1.29-1.40, and the presence on genu I of only two solenidia.