Montenegtrombium milicae gen. et sp. nov. (Acari: Microtrombidiidae) is described and illustrated from larvae ectoparasitic on Calliptamus italicus (Linnaeus, 1758) (Orthoptera: Acrididae) and Carpocoris purpureipennis (De Geer, 1773) (Hemiptera: Pentatomidae) from Montenegro.