Giraudia nana, Watanabe, 2025

Key to Japanese species of Giraudia View in CoL (Males of Gi. nana sp. nov. and Gi. kurenai sp. nov. are unknown.)

1. Scutellum without yellow spot ( Figs. 26B, H, 27B, 28B, H, 29B). Metasoma and legs largely black in female ( Figs. 26B, 28B). Dorsal face of tibiae with robust, large (especially in Gi. spinosa View in CoL ), conspicuous setae ( Figs. 26G, 28G).

................................................................................................ 2 -. Scutellum with yellow spot ( Figs. 23B, E, 24, B, G, 25B, H). Metasoma and legs sometimes with reddish or yellowish area(s) in female ( Figs. 24A, B). Dorsal face of tibiae with or without robust, large, conspicuous setae.

................................................................................................ 3 2. Body lustre dull ( Figs. 26A, E, 27A, E). ISP of mesopleuron and metapleuron not polished ( Fig. 26E). Malar space 0.7–0.75 × as long as basal width of mandible. Robust and large setae on hind tibia strong in female ( Fig. 26G). Clypeus and mandible largely blackish-brown to reddish-brown in male ( Fig. 27C). Hind tarsus without ivory band in male ( Fig. 27A)

............................................. Giraudia spinosa Uchida, 1936 View in CoL -. Body lustre strong ( Figs. 28A, E). ISP of punctures of mesopleuron and metapleuron polished ( Fig. 28E). Malar space 0.55–0.7 × as long as basal width of mandible. Robust and large setae on hind tibia weak in female ( Fig. 28G). Clypeus and mandible largely yellow in male ( Fig. 29C). Hind tarsus with ivory band in male ( Figs. 29A, B).

......................................... Giraudia teranishii Uchida, 1930 View in CoL 3. Propodeum matt ( Fig. 23E). Body length longer than 9.0 mm. Dorsal face of tibiae with robust, large, conspicuous setae.

...................................... Giraudia japonica Watanabe, 2019 -. Propodeum polished ( Figs. 24G, 25H). Body length shorter than 8.0 mm. Dorsal face of tibiae without robust, large, conspicuous setae ( Fig. 25G).

................................................................................................ 4 3. T I and T II reddish yellow except for base of T I white ( Fig. 24A). Coxae whitish yellow to reddish yellow ( Fig. 24A). Propodeal carinae complete ( Fig. 24G). Anterior tentorial pit large. Lower tooth of mandible shorter than upper tooth.

....................................................... Giraudia kurenai sp. nov -. Metasomal tergites and coxae black ( Fig. 25A). Propodeal carinae absent anteriorly ( Fig. 25H). Anterior tentorial pit small. Lower tooth of mandible longer than upper tooth.

.......................................................... Giraudia nana sp. nov.