Lycogaster violaceipennis Chen, 1949

Chen, Hua-yan, van Achterberg, Cornelis, He, Jun-hua & Xu, Zai-fu, 2014, A revision of the Chinese Trigonalyidae (Hymenoptera, Trigonalyoidea), ZooKeys 385, pp. 1-207 : 38-42

Lycogaster violaceipennis Chen, 1949 Figs 141-154

Lycogaster violaceipennis Chen, 1949: 10; Weinstein and Austin 1991: 415; Carmean and Kimsey 1998: 62; He 2004: 73.

Type material.

Lectotype here designated, ♂ (IZCAS) "[China: Zhejiang], Mokan Shan (= Mt. Mogan), Musée Heude", "10.VII.[19]37, O. Piel", "♂ Lycogaster violaceipennis Chen". Paralectotype: 1 ♂ (IZCAS); damaged, mainly head and mesosoma remaining), with same label data.

Additional material.

1 ♀ + 1 ♂ (IZCAS) "[China:] Sichuan, Mt. Emei, Baoguosi, 550-750 m, 7.VI.1957, You-cai Lu, IOZ(E)1495236; id., but 30.V.1957, Fu-xing Zhu, IOZ(E)1495237"; 1 ♀ (IZCAS) "[China:] Sichuan, Mt. Emei, 4.VI.1957, Ke-ren Huang, IOZ(E)1495438".

Diagnosis.

Outer side of supra-antennal elevations strongly oblique and elevations 0.2 times as long as scapus (Fig. 146); antenna of ♀ comparatively less elongate and distinctly widened medially; area between ocelli and eye largely coarsely and densely punctate (Fig. 146); mandible black (♀) or largely ivory (except dark brown teeth; ♂) (Fig. 145); mesosoma largely reddish brown dorsally; fore wing largely dark brown (Fig. 148); second tergite punctate and moderately shiny; second sternite of ♀ with pair of widely separated triangular teeth sublateral teeth and in between sternite strongly convexly protruding medio-posteriorly (Fig. 143); second metasomal sternite of ♂ with pair of small sublateral flaps, flat medio-posteriorly and sternite weakly convex medially in lateral view (Fig. 154).

Description.

Lectotype, male, length of body 14.4 mm (of fore wing 11.5 mm).

Head. Antenna with 24 segments, without tyloids, segments after third segment distinctly widened and after 14th segments becoming gradually slenderer (Fig. 147); frons and vertex coarsely and densely reticulate-punctate (Figs 145, 146), with medium-sized yellowish setae; head subparallel-sided behind eyes, gradually narrowed posteriorly and about 1.3 times wider than mesoscutum (Fig. 146); dorsal length of eye 0.8 times length of temple (Fig. 146); temple coarsely and densely reticulate-punctate, with rather long yellowish setae; occipital carina narrow lamelliform medio-dorsally, with a few weak carinae; supra-antennal elevations hardly developed as a thin rim and smooth; clypeus weakly emarginate and comparatively thin medio-ventrally.

Mesosoma. Length of mesosoma 1.6 times its height (Fig. 151); mesopleuron below transverse mesopleural groove coarsely and densely reticulate-punctate anteriorly and oblique rugose posteriorly, above groove coarsely rugose with several large crenulae medially; transverse mesopleural groove narrow, deep and moderately crenulate; notauli widened, coarsely crenulate; mesoscutum densely reticulate-rugose (Fig. 150); scutellar sulcus wide, both medially and laterally and coarsely crenulate; scutellum densely reticulate-rugose, rather flat and anteriorly near level of mesoscutum; metanotum flat, shiny and smooth medially (Fig. 150); propodeum irregularly rugose and carina of foramen thick and arched (Fig. 150); foramen medially 0.5 times higher than wide basally.

Wings. Fore wing: length of vein 1-M 1.4 times as long as vein 1-SR (Fig. 148).

Metasoma. First tergite 0.4 times as long as apically wide, gradually narrowed basally, with shallow elliptical depression medially (Fig. 152) and flattened apically; second–fifth tergites largely densely and coarsely punctate and rather moderately shiny; second sternite similarly sculptured as tergite, with pair of small sublateral flaps (Fig. 154), flat medio-posteriorly and sternite weakly convex medially in lateral view; third sternite about 0.2 times as long as second sternite (Fig. 154); genitalia extruded (Fig. 153).

Colour. Black; mandible largely ivory except dark brown teeth; palpi, pterostigma and veins dark brown; mesosoma largely reddish brown except for ventral half of mesopleuron and metapleuron and posterior half of propodeum dark brown to black; outer side of fore femur, large part of middle and hind femur, all coxae and tarsus dark brown, remainder of legs ivory; pair of large lateral patches on second tergite yellow; fore wing largely dark brown, but paler subbasally (Fig. 148).

Variation. Length of body 12.3 mm, of fore wing 9.7 mm; legs darker; length of vein 1-M of fore wing 2.0 times as long as vein 1-SR.

Female. Length of body 14.4-15.0 mm, of fore wing 11.5-12.0 mm; medio-apical protuberance of second sternite lamelliform and convex medio-apically (Fig. 143) and with pair of triangular submedial teeth, third sternite with distinct ledge (Fig. 143); hypopygium incised apically.

Biology.

Unknown. Collected in May–July at 550-750 m.

Distribution.

China (Zhejiang, Sichuan).