Description of the male of Suárez, 1960 (Hymenoptera, Mutillidae), including new information on the biology of the genus.

The male of Suárez, 1960 is described and associated with the female based on couples reared from trap-nests occupied by Dreisbach, 1963 (Hymenoptera: Pompilidae). Information on the diapause of and Pseudomethoca nr. chontalensis (Cameron, 1895) (Hymenoptera: Mutillidae) is presented.

Review of Calomutilla Mickel, 1952, a new species, and comparison with Pertyella Mickel, 1952 (Hymenoptera: Mutillidae).

Calomutilla panamensis Cambra, Brothers Quintero sp. nov., female and male from Panama and Venezuela, and the hitherto unknown male of Calomutilla crucigera (Burmeister, 1854), are described and illustrated.

A new species of spider wasps (Hymenoptera: Pompilidae) from Panama: Mystacagenia kimseyae sp. nov.

Mystacagenia Evans, 1973 is a strictly Neotropical genus of pompilid wasps (Pepsinae: Ageniellini), restricted to rain forest areas. The genus comprises four described species: M. albiceps Evans, 1973 (Peru, Brazil), M.

Review of Leucospilomutilla Ashmead and Description of the New Genus Atlantilla (Hymenoptera: Mutillidae).

The new genus Atlantilla Williams & Bartholomay, gen. nov. (type species Mutilla auriculata Gerstaecker, 1874), is proposed based on the combination of previously undescribed males from the Atlantic Forest and females of Traumatomutilla auriculata (Gerstaecker, Arch Naturgesch 40:41-77, 1874).

Ephuta icema Casal, 1969 and its host Auplopus subaurarius Dreisbach, 1963 (Hymenoptera: Mutillidae, Pompilidae) from Brazil.

The male and female of Ephuta icema Casal, 1969 are reared from the host Auplopus subaurarius Dreisbach, 1963 (Hymenoptera: Pompilidae) that allow to unit both sexes for this mutillid and describe hitherto unknown male. A review of all the previous host records for the genus Ephuta Say, 1836 is given.

Review of Williams in Bartholomay , 2015, with description of a new species from Panama (Hymenoptera: Mutillidae).

Frigitilla panamensis Cambra, Brothers & Quintero sp. nov., from Panama, based on females, is described and illustrated.

A new species of Hoplognathoca Suárez, 1962 from Central America and description of male of Hoplognathoca costarricensis Suárez, 1962 (Hymenoptera: Mutillidae).

Hoplognathoca jinotega Cambra, Quintero & Brothers, sp. nov., female, from Nicaragua and Guatemala and the male of H.