Descriptions of three new species of the genus Stenodyneriellus Giordani Soika with keys to some related species (Hymenoptera, Vespidae, Eumeninae)

Three new species, namely Stenodyneriellusangustus sp. n. from Thailand, S.profundus sp. n. from Philippines, and S.longitergus sp. n. from Indonesia, are described and illustrated in detail. Stenodyneriellusmaculatus Gusenleitner, 2013 is newly recorded from Vietnam. Two keys to some related species are also provided.