A revision of the Neotropical eumenine wasp genus Stenosigma Giordani Soika, 1978 (Hymenoptera, Vespidae).

The Neotropical eumenine wasp genus Stenosigma Giordani Soika, 1978 is revised. Stenosigma mariae Ferreira Hermes sp. nov.

A new contribution to the knowledge of Neotropical Eumeninae (Hymenoptera, Vespidae).

A new species, Pirhosigma sulcata Ferreira & Hermes, sp. nov. is described from the Brazilian Amazon; the male of Pararhaphidoglossa gibbiventris Giordani Soika, 1978 is described for the first time.