Pantolyta atrata Foerster, 1861

Chemyreva, V. G. & Kolyada, V. A., 2019, Review of the Pantolyta genus (Hymenoptera: Diapriidae: Pantolytini) from Russia, with description of a new species, Zoosystematica Rossica (China) 28 (1), pp. 163-176 : 165

Pantolyta atrata Foerster, 1861

( Figs 1–9)

Pantolyta atrata Foerster, 1861: 43 .

Material examined. Russia: Novgorod Prov., Pestovo Distr., Tychkino , 6 July 1986 and 20–25 June 1999 ( V. Tobias leg.), 2 females, 4 males ; Bryansk Prov., 10 km W of Novozybkov, Perevoz , 1–15 July 1970 ( V. Tobias leg.), 1 male ; Krasnoyarsk Terr., Taymyr, estuary of Maymechi River , 7 June 1970 (I. Sukacheva & V. Zherikhin leg.), 1 male ; Buryatia, Yeravninsky Distr., Vitim River, Baisa , 16–27 June 1997 (M. Mostovski leg.), 3 males ; Vitim River, Romanovka , July 1969 ( V. Zherikhin leg.), 1 male ; Yakutia, Oymyakonsky Distr., Tomtor , 5–27 August 1990 ( V. Alekseev leg.), 14 females ; Magadan Prov., Srednekansky Distr. , 12 km N of Seymchan, 30 August 1975 (Marshakov leg.), 1 male ; Amur Prov., Zeya Nature Reserve , 17 August 1981 and 2 September 1981 ( V. Alekseev leg.), 2 females ; Khingan Nature Reserve, Kundur , 18–20 July 2003 (S. Belokobylskij leg.), 1 female .

Differential diagnosis. Pterygopolymorphic species ( Figs 1, 3, 4). In winged morphs, radial cell open ( Fig. 3). Antennal shelf distinctly prominent; head nasiform ( Fig. 4); temples in dorsal view parallel ( Fig. 4). Epomia distinct ( Fig. 7). Axillar depression without verriculate tubercle. A 1 in both sexes long and slender, distinctly longer than half of head width and without apical flanges ( Fig. 5). Female: antennae moniliform; A5–A7 as wide as long to transverse; A8–A14 transverse ( Fig. 2). Male: fore tibia incurved, with a row of long stout setae ( Fig. 9); A3 rather thickened, with deep emargination ( Figs 6, 8).

Variation. Pterygopolymorphic with alate to wingless morphs ( Figs 1, 3); micropterous and wingless morphs with narrowed mesosoma and flattened mesoscutum ( Fig. 1). Pronotal shoulders distinctly or weakly sculptured and with sharp keel; pronotal collar sculptured, with transverse keel interrupted medially or obliterated. Postmarginal vein absent to quite long. Petiole subquadrate to 1.4 times as long as wide. Female: body yellowish brown to brown; body length 2.0– 2.8 mm; median propodeal keel simple or furcate; A4 slightly elongate to distinctly transverse; A5–A7 as wide as long to transverse; A13–A14 more or less broadened, 1.4–2.2 times as wide as A3. Male: body yellowish brown to dark brown; body length 1.7–2.3 mm; A3 with deep emargination and with keel extending 0.44–0.67 of segment length ( Fig. 6); A4 0.56–0.76 times as long as A3.

Distribution. Czech Republic, Sweden, Poland, Germany, Russia (European Part, *East Siberia, *Far East).