Trachyserphus

Kolyada, Victor & Mostovski, Mike B., 2017, Revision of the genus Hormoserphus Townes, 1981 (Hymenoptera: Proctotrupidae), with description of Trachyserphus gen. n. and a new species, Zootaxa 4254 (5), pp. 575-583 : 581

Key to species of Trachyserphus

1 Area between antennal sockets strongly convex. Occipital carina developed in its upper part as high collar ( Figs 2 E, 2F). Longer spur of hind tibia reaching 0.7 basitarsus length ( Fig. 2 M). Fore wing basally with well expressed sclerotized medio-cubital crossvein ( Fig. 2 N).................................................................. T. segregatus (Townes)

- Area between antennal sockets weakly convex or flat ( Figs 3 E, 4H). Occipital carina less developed ( Fig. 4 I). Longer spur of hind tibia reaching 0.5 basitarsus length ( Figs 3 J, 4M). Medio-cubital crossvein at fore wing base unsclerotized ( Fig. 3 H)... 2

2 Distance from lower edge of clypeus to centre of tentorial pit 1.1× less than distance to lower edge of antennal socket ( Fig. 4 G). Mesoscutum posteriorly with noticeable depressions ( Fig. 4 D)................................. T. masneri sp. n.

- Distance from lower edge of clypeus to centre of tentorial pit 1.3× less than distance to lower edge of antennal socket ( Fig. 3 D). Mesoscutum posteriorly without noticeable depressions ( Fig. 3 C)........................... T. defrictus (Townes)

Figures

FIGURE 2. Trachyserphus segregatus. A, pronotum laterally; B, C, female and male propodeum laterally; D, female head frontal view; E, F, male head dorsally; G, mesonotum dorsally; H, I, general habituses of male and female in lateral view; J, female antenna; K, ovipositor sheath; L, male antenna; M, hind leg; N, wing venation. Scale bars 0.1 mm in all figures except for 1 mm in Figs 2 H, 2 I.

FIGURE 3. Trachyserphus defrictus. A, pronotum laterally; B, propodeum laterally; C, mesonotum dorsally; D, female head frontal view; E, head dorsally; F, base of syntergite dorsally; G, general habitus of male in lateral view; H, wing venation; I, male antenna; J, hind leg. Scale bars 0.1 mm in all figures except for 1 mm in Fig. 3 G.

FIGURE 4. Trachyserphus masneri sp. n. A, pronotum laterally; B, mesopleuron laterally; C, propodeum laterally; D, mesonotum dorsally; E, propodeum dorsally; F, base of syntergite dorsally; G – I, female head frontal, dorsal and occipital views; J, general habitus of female in lateral view; K, female antenna; L, ovipositor sheath; M, hind leg; N, wing venation; O, male antenna. Scale bars 0.1 mm in all figures except for 1 mm in Fig. 4 J.