Abstract
Ampulicomorpha thauma Rasnitsyn & Matveev (Hymenoptera: Embolemidae) and Sclerogibba rossi Olmi (Hymenoptera: Sclerogibbidae) were newly recorded from Japan. Females of Embolemus walkeri Westwood were found in the soil together with nymphs of Cixiidae. Trogloembolemus okanoi sp. nov. is described and illustrated. The holotype ♀ was collected in the soil at a depth of one meter. A key to species of Japanese Embolemidae was updated.
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