Giraudia nana, Watanabe, 2025

Giraudia nana sp. nov.

[New SJN: Murota-togari-himebachi]

( Figs. 25A–H, 78T)

Type series. Holotype: JAPAN, KPM-NK 91388 , F, Honshu, Fukui Pref., Katsuyama City, Ohara , 19. VI. 1982, T. Murota leg.

Description. Female (n = 1). Body punctate and polished; covered with setae; body length 7.2 mm.

Head 0.65 × as long as wide in dorsal view. Clypeus 3.8 × as wide as long; slightly convex in lateral view; transversely rugose and punctate dorsally; lower margin weakly rounded in frontal view, sharp in lateral view. Face 0.38 × as long as minimum width; weakly convex medially; matt; sparsely punctate. Anterior tentorial pit small. Frons weakly concave above antennal sockets; matt and punctate dorsally, coriaceous to smooth ventrally. POL 1.1 × as OD. OOL 1.1 × as OD. Gena and occiput densely punctate. Dorsal profile of gena rounded in dorsal view; width gradually narrowing posteriorly ( Fig. 25D). Occipital carina complete. Malar space 0.8 × as long as basal width of mandible. Mandible flat at base; lower tooth longer than upper tooth. Antenna with 26 flagellomeres; apical part flattened below and tapped to slender apex ( Fig. 25A). FL I 2.1 × as long as maximum depth in lateral view, 0.95 × as long as FL II.

Mesosoma densely punctate. Epomia short; section on border of collar and pronotum present. Mesoscutum with short and weak notaulus. Scutellum punctate; weakly convex in lateral view. Mesopleuron without conspicuous smooth area around speculum ( Fig. 25E). Epicnemial carina present laterally and ventrally. Sternaulus deep in anterior 0.4 of mesopleuron. Metapleuron minutely rugulose ventrally; with anterior part of juxtacoxal carina. Propodeum with long dorsal face (longer than area postero); anterior transverse carina absent ( Fig. 25H); posterior transverse carina complete; lateromedian longitudinal carina absent; lateral longitudinal carina complete and weak; pleural carina complete; area superomedia not defined; apophysis absent; spiracle oval. Fore wing length 6.1 mm. Areolet as long as maximum width; width steeply narrowing anteriorly; received vein 2m-cu at near middle. Fore wing vein 1cu-a slightly antefurcal to vein M&RS ( Fig. 25F). Nervellus inclivous; intercepted near posterior end of vein ( Fig. 25F). Hind femur reticulate coriaceous; 4.0 × as long as maximum depth in lateral view. Dorsal face of tibiae without robust, large, conspicuous setae ( Fig. 25G). Tarsal claws simple.

Metasoma finely punctate; ISP coriaceous. T I 2.4 × as long as maximum width; latero-median carina absent; dorso-lateral carina absent. T II 0.65 × as long as maximum width. Thyridium present; close to anterior margin of T II; slightly depressed; ca. 2.0 × as wide as length. Ovipositor sheath 0.95 × as long as hind tibia, 1.4 × as long as T I. Ovipositor straight; apex sharp; apex of lower valve with teeth ( Fig. 78T).

Colouration ( Figs. 25A–H). Body (excluding wings) black to blackish-brown. Setae silver. Mandible yellowish-brown except for brown apex. Ventral part of clypeus, scape, pedicel, fore and mid coxae, trochanters, and trochantelli, postscutellum, and hind tarsus tinged with brown. Dorsal part of frons and vertex with pair of reddish-brown markings along orbits. Ventral surface of flagellum partly tinged with brown. Palpi and fore and mid tibiae, tibial spurs, and tarsi yellowish-brown. FL VI to FL XI with white markings. Scutellum yellow except for anterior part. Posterior margin of metasomal tergites narrowly tinged with reddish-brown. Thyridium and ovipositor reddish-brown. Wings hyaline. Veins and pterostigma yellowish-brown except for yellowish wing base.

Male. Unknown.

Distribution. Japan (Honshu).

Bionomics. Unknown.

Etymology. The specific name is from Latin “ nanus ”, which means the dwarf.

Remarks. This species resembles Gi. japonica in body coloration but can be distinguished by the polished mesosoma (matt in Gi. japonica ), the weak notaulus (sharp and strong in Gi. japonica ), and the small body size (large in Gi. japonica ; see above key).