Anterhynchium (Dirhynchium) flavolineatum (Smith, 1857)

(Figs 3, 7C)

Odynerus flavo-lineatus Smith, 1857: 60, female. Holotype, female, “ Java ” [Indonesia], deposited in BMNH (type № 18.454), not examined.

Anterhynchium flavolineatum: Nguyen 2015: 136.

Dianosis. This species differs from other species in the subgenus Dirhynchium by the following combination of characteristics: body smaller than other species (usually less than 13 mm); punctures on head and mesosoma weaker compared to other species; triangular area at base of propodeum is much longer than wide, bordered on each side by deep groove; declivity of propodeum not bordered dorsally by carina; body with more yellow marks compared to other species: antennal scape beneath, large yellow spot on each side of propodeum, broad yellow stripe on all tibiae, terga I–V with apical yellow bands, bands on terga I and II dialated laterally; in male, digitus almost rocket-shape apically, with dense and long setae on its surface medially; penis valve, in profile apical part strongly produced to triangle-shape.

Description of male genitalia (Figs 3A–E). Genitalia were taken from specimens from Thanh Hoa Province. Tergum VIII widest at middle lengh, with lateral margins almost parallel at middle part, about 2.3 × as long as wide (at widest part), with narrow part at apex long (about 0.2 × its length) (Fig. 3A). Parameral spine without setae. Volsella flattened, spatulate, wide on inner aspect, and without setae at top (Fig. 3B). Digitus almost rocket-shape apically, with dense and long setae on its surface medially, about 3.2 × as long as wide (at widest part) (Fig. 3C). Penis valve long (Figs 3D, E), about 1.4× as long as basal apodeme, in profile apical part strongly produced to triangle-shape (Fig. 3E); middle rod shorter than basal apodeme.

Material examined. VIETNAM. Tuyen Quang: 1 ♀, Na Hang, Na Hang NR, Bac Vang RS, 22°27’50”N 105°24’26”E, 153 m, 10.VI.2015, L.T.P. Nguyen, D.D. Nguyen & L.X. Truong; Bac Kan: 1 ♀, Na Ri, Lang San, 21°15’N 106°06’E, 270 m, 3–4.VIII.2012, J. Kojima, H Nugroho & IED-c; Son La: 1 ♂, Yen Chau, Muong Lum, 20.VI.2015, M.Q. Pham; Thanh Hoa: 1 ♂, Xuan Lien NP, Hon Can, Thuong Xuan, Van Xuan, 19°52’27.5”N 105°14’20.8”E, 106 m, 24.VIII.2012, L.T.P. Nguyen (specimen with male genitalia dissected); Quan Hoa, Pu Hu NR, [1 ♀, 20°29’10.7”N 104°57’9.3”E, 243m, 11.VI.2016, L.T.P. Nguyen; 1 ♂, 20°29’13.3”N 104°57’47.2”E, 13.VI.2016, L.X. Truong, D.D. Nguyen, N.T. Tran & L.N. Ha]; Nghe An: 1 ♂, Con cuong, Con Cuong ranger station, 3.VI.2018, T.V. Nguyen; 1 ♂, Con Cuong, Pu Mat NP, Khe Choang ranger station, 18°57’44.8”N 104°41’0.8”E, 142 m, 1.IX.2020, N.T. Tran; 1 ♀, Pu Mat NP, 26.VII.2004, L.T.P. Nguyen; Ha Tinh: 1 ♀, Huong Son, Son Tay, 19–24.V.2004, L.T.P. Nguyen; Dak Nong: 1 ♂, Dak Som, Ta Dung NR, 11°50’16.1”N 107°59’16.7”E, 745 m, 6.V.2016, L.T.P. Nguyen, D.D. Nguyen & N.T. Tran (all deposited in IB).

Distribution. India: Arunachal Pradesh, Meghalaya, Sikkim, West Bengal; China: Hong Kong, Yunnan; Myanmar; Vietnam (Tuyen Quang *, Bac Kan, Son La *, Thanh Hoa, Nghe An, Ha Tinh, Dak Nong *); Malaysia; Indonesia: Sumatra, Java, Kalimantan, Sumba, Flores.