Trachyserphus segregatus (Townes in Townes & Townes, 1981 ) Townes in Townes & Townes, 1981

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 : 578

Trachyserphus segregatus (Townes in Townes & Townes, 1981) , comb. n.

( Figs 2 A–N)

Hormoserphus segregatus Townes in Townes & Townes, 1981: 115 (female). Hormoserphus chinensis He & Fan, 1991: 220 (male), syn. n.

Hormoserphus striatus He & Xu, 2015: 203 (male), syn. n.

Redescription. Female: Fore wing length 3.7 mm. Entire frons densely pilose, entire face finely punctate. Area between antennal sockets strongly convex, weakly pointed. Distance between antennal sockets 2 times greater than their diameter. Occipital carina developed in its upper part as high collar, not reaching oral carina for approx. 0.3 length of its lower part. Сlypeus flat, wide and short, its apex broadly truncate. Distance from lower edge of clypeus to centre of tentorial pit 1.3 times less than distance to lower edge of antennal socket. Labrum evenly rounded apically. Mandible moderately stout, unidentate. Gena very short. Antenna long, filiform; 3rd antennomere 4 times as long as wide. Eye bare. Notauli wide and coarse at base, reaching mid mesoscutum as shallow excavations. Mesoscutum posteriorly without noticeable depressions. Humeral tubercle very well developed, broadly rounded, with neither keels nor wrinkles. Pronotal scrobe with coarse vertical wrinkles. Speculum with fan of developed keels in upper anterior part. Horizontal mesopleural groove deep and wide. Mesepimeral sulcus entirely foveate, large, in lower part with group of diverging coarse wrinkles. Metapleuron laterally with shiny bare area occupying about one third of its surface; the area with shallow indistinct groove in its upper part. Longer spur of hind tibia reaching 0.7 basitarsus length. Propodeum with coarse reticulation and dense, long setae, dorsally with two large lateral areas separated by weakly reticulated keel. Stigma deep, trapezoid. Fore wing basally with well expressed sclerotized medio-cubital crossvein. Syntergite base with small longitudinal groove. First pair of tyridia elongate, approximately as long as longitudinal groove at base of syntergite. Ovipositor sheath broad and short, 0.3 times as long as hind tibia; sheath surface neither punctate nor striated and also devoid of setae save for small tuft near apex.

Colour: Entire body black, shining; legs except for coxae and trochanters light to dark brown. Stigma dark brown.

Male: Differs from female in having smaller and apically evenly rounded convexity in lower part of face ( Figs 2 E, F). Flagellomeres without noticeable tyloids; 3rd antennomere 3 times as long as wide.

Type material examined. Holotype ♀ ( CNCI No. 17159): Nepal: Katmandu , Godavari [27°35'N 85°24'E], 6000 ft, 23–26.vii.1967, Mal[aise]. Tr[ap]., Can[adian]. Exp[edition].

Other material examined. PR China: ♂ Sichuan, 20 km E Maerkang, Qionglai Shan [31°30'N 102°30'E], 2656 m, 3.viii.2002, S.A. Cameron & J.B. Whitfield . Taiwan: ♀ Taichung Hsien, Anmashan [24°15'N 120°54'E], 2225 m, 2.v.1990, A. Smetana . Vietnam: Tam Dao N.P., Tam Dao env., 21°27'38"N 105°38'28"E, 900–1200 m, 13–26.vi.2011, E. Jendek ( CNCI) .

Distribution. South and South-East Asia ( Nepal, southern China, Taiwan and Vietnam).

Remarks. Hormoserphus chinensis He & Fan, 1991 and Hormoserphus striatus He & Xu, 2015 , were described from the Sichuan and Yunnan provinces in southern China. The authors provided good quality photographs of the holotypes of both species, as well as thorough original descriptions and comparisons. Minor differences indicated by the authors of these species, the shape of the smooth area on the metapleuron and the degree of striation on the mesopleuron, are treated by us as intraspecific variation. This prompted synonymy of Н. chinensis and H. striatus under T. segregatus .

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.