Gelastagathis frosti Sharkey NEW SPECIES

(Fig. 4)

Description ♂. Length. 5.3 mm. Color: Testaceous except for terminal metasomal segments black, antenna melanic, wings infuscate, propodeum melanic. Head: in frontal view 1.7 x wider than high (measured from top to apex of clypeus). Antennal flagellum with 27 flagellomeres. Mesosoma: Notaulus complete, smooth anteriorly, weakly pitted posteriorly. Hind tibia with 1 apical peg. Propodeum entirely rugose with two irregular longitudinal carinae defining a medial region. Metasoma: First median tergite with weak longitudinal striae. Second median tergite with a curved transverse groove.

Material examined. Known only from the holotype ♂: USA, Massachusetts, Natick, Sept. 1935, C.A. Frost. Approximately 42° 17’N, 71° 20’W and 50 m. elevation. (USNM).

Etymology. Named after the collector of the type specimen.