Antrocephalus sepyra (Walker, 1846)

Narendran, T. C. & van Achterberg, Cornelis, 2016, Revision of the family Chalcididae (Hymenoptera, Chalcidoidea) from Vietnam, with the description of 13 new species, ZooKeys 576, pp. 1-202 : 16-19

Taxon classification Animalia Hymenoptera Chalcididae

Antrocephalus sepyra (Walker, 1846) Figs 21-22

Halticella sepyra Walker, 1846: 110 (India (lectotype selected by Bouček) (HDOU) (examined); synonymy by Narendran (1989) with Antrocephalus dividens (Walker)).

Chalcis dividens Walker, 1860: 357 (♀ Sri Lanka (BMNH) examined); junior synonym of Halticella sepyra Walker.

Halticella apicalis Walker, 1874: 400. (♀, Japan (BMNH) (examined); synonymy by Narendran (1989) with Antrocephalus dividens (Walker)).

Halticella (Stomatoceras) tinctipennis Cameron, 1888: 118 (Japan (BMNH) (examined); synonymy by Habu (1960) with Antrocephalus apicalis (Walker)).

Coelochalcis carinifrons Cameron, 1904: 111 (♂, India, Sikkim (BMNH) (examined); synonymy by Narendran (1989 with Antrocephalus dividens (Walker)).

Antrocephalus varipilosus Cameron, 1907: 580 (♂, India, Gujarat, Dredra (BMNH) examined; synonymy by Narendran (1989) with Antrocephalus dividens (Walker)).

Sabatiella nepalensis Mani & Dubey (in Mani et al.), 1974: 21 (♀, Nepal, Kathmandu (USNM) (examined); synonymy by Narendran (1989) with Antrocephalus dividens (Walker)).

Antrocephalus delhiatus Roy & Farooqi, 1984: 9 (♀, India, Delhi (INPC) (examined); synonymy by Narendran (1989) with Antrocephalus dividens (Walker)).

Material

(RMNH, IEBR, labelled as Antrocephalus dividens , Antrocephalus fascicornis or Antrocephalus japonicus by first author). 4 ♀ + 7 ♂, "Vietnam: Ninh Thuân, Núi Chúa N. P., northeast part, Malaise trap, 90-150 m, 23-30.v.2007, C. v. Achterberg & R. de Vries, RMNH’07”; 1 ♀ + 1 ♂, "S. Vietnam: Dóng Nai, Cát Tiên N. P., c 100 m, 13-20.v.2007, Botanical Garden, Malaise traps 14-19, C. v. Achterberg & R. de Vries, RMNH’07”; 2 ♀ + 1 ♂, id., but 14-20.v.2007, Malaise traps 20-23, Lagerstroemia trail; 1 ♀, id., but 9-30.iv.2007, Ficus trail; 1 ♀, id., but Dong trail, 9. iv.-9.v.2007, M.P. Quy, N.T. Manh & C. v. Achterberg, RMNH’ 07; 1 ♂, id., but 13-19.v.2007; 1 ♂, id., but 19-25.iv.2007; 2 ♂, id., but 1-8.iv.2007, Mai Phu Quy & Nguyen Tanh Manh; 1 ♀, "S. Vietnam: Dak Lak, Chu Yang Sin N. P., near dam, c. 500 m, 3-9.vi.2007 & 1-10.vi.2007, Malaise trap, C. v. Achterberg & R. de Vries, RMNH’07”; 1 ♂, id., but near river, c. 740 m, 1-10.vi.2007; 1 ♂, id., but Krong K’Mar, 740-900 m, 2-10.vi.2007; 1 ♂ (RMNH), "C. Vietnam: Ha Tinh, Vu Quang N. P., 111 m,, 18°19'40"N 105°26'29"E, 23.ix.-5.x.2009, Mal[aise] trap 23, C. v. Achterberg & R. de Vries, RMNH’09”; 1 ♂ (RMNH), "C. Vietnam: Ha Tinh, Vu Quang N. P., 1.x.2009, by hand, R. de Vries, RMNH’09”.

Diagnosis.

Antrocephalus sepyra (Walker) comes very near Antrocephalus fascicornis (Walker) in general appearance such as colour and sculpture on mesosoma. However, Antrocephalus fascicornis differs from Antrocephalus sepyra in having: 1) hind femur with a long row of comb teeth occupying a trifle shorter than three-fourth of outer ventral margin from apex to base (in Antrocephalus sepyra the length of row of comb teeth is shorter); and 2) head in profile with a sharp angle in front of eyes. (in Antrocephalus sepyra no such sharp angle in front of eyes in profile).

Description.

♀, length of body 4.0-5.5 mm.

Colour. Head black; eyes pale yellow or pale yellowish gray or black; tegula reddish brown or pale yellowish brown; all legs except black fore coxa ferruginous red; metasoma black; pedicel, ring segment and F1 pale in some specimens.

Head. Scape not reaching anterior ocellus.

Mesosoma. Pronotum with anterior carinae and tubercles; apex of scutellum weakly emarginated.

Legs. Hind coxa without a tooth dorsally; hind femur without an inner basal tooth.

Metasoma. Metasoma about as long as combined length of head and mesosoma. T1 smooth and shiny with a pair of short basal carinae.

Male. Antenna longer than that of ♀; metasoma shorter than head plus mesosoma.

Variation.

Colour of hind tibia varies from reddish brown to black (except apically) as emargination of apex of scutellum. Colour of hind femur is black with base and apex reddish brown and pedicel to F5 reddish brown in one specimen (labelled as " Antrocephalus japonicus ").

Host.

Unknown.

Distribution.

India, Nepal, Sri Lanka, Japan, Vietnam (new record).