Foersteria Szépligeti

Yan, Cheng-Jin, He, Jun-Hua & Chen, Xue-Xin, 2013, Two genera Foersteria Szépligeti, 1896 and Polydegmon Foerster, 1862 (Hymenoptera, Braconidae, Brachistinae) from China, with description of a new species, Zootaxa 3683 (2), pp. 178-184 : 179

Key to the Palaearctic species of the genus Foersteria Szépligeti

1 Length of ovipositor sheath 1.2–1.5 times fore wing; subapical antennal segments of female slender; length of eye in dorsal view 0.7–0.8 times temple............................................................................... 2

- Length of ovipositor sheath 0.5–1.1 times fore wing; subapical antennal segments of female robust; length of eye in dorsal view 1.0–1.4 times temple............................................................................... 3

2 Second metasomal tergite densely rugose-reticulate; third tergite with very coarsely cellulite and protruding sculpture medioposteriorly; length of ovipositor sheath about 1.3 times fore wing; ventral carina of fore coxa distinct; face coarsely transversely rugose; antennal segments 29–31; apical rim of clypeus distinctly differentiated from remainder of clypeus............................................................................................ F. polonoca Fahringer

- Second tergite (finely) punctate; third tergite largely smooth or punctate with subapical rugose (at least laterally); length of ovipositor sheath 1.4–1.5 times fore wing; fore coxa without ventral carina; face punctate (-rugose); antennal segments 26–27; clypeus with its apical rim less differentiated......................................... F. longicauda van Achterberg

3 Length of ovipositor sheath 0.5–0.9 times fore wing; tarsal claws with minute acute lobe.............. F. puber (Haliday)

- Length of ovipositor sheath 0.9–1.1 times fore wing; tarsal claws evenly curved ventrally, and without lobe.............. 4

4 Face below antennal sockets only coarsely punctate; third tergite without coarse rugae or carina in front of transverse striae, seldom rugulose and exceptionally (males only) distinctly rugose; third tergite simple, without transverse and longitudinal lamellate protrusions dorsally......................................................... F. laeviuscula Szépligeti

- Face below antennal sockets very coarsely transversely rugose; third tergite densely reticulate-rugose in front of transverse striae; medio-posterior of third tergite with transverse and longitudinal lamellate protrusions dorsally..................................................................................................... F. xinjiangensis sp. nov.