A new species of subgenus Neodoryctes Szépligeti ( Hymenoptera , Braconidae ) from China , with a key to Oriental and Palaearctic species

A new species of subgenus Neodoryctes Szépligeti (Hymenoptera: Braconidae), Doryctes (Neodoryctes) henanensis Li & van Achterberg, sp. n., is described and illustrated. This species is associated with Pterolophia sp. (Coleoptera: Cerambycidae), a twig-boring pest of Broussonetia papyrifera (L.) L’Hert. et Vent. (Moraceae), in Henan (Central China). A key to the Palaearctic species of the subgenus Neodoryctes is provided.


Introduction
The subgenus Neodoryctes Szépligeti, 1914 of the genus Doryctes Haliday, 1836 (Hymenoptera: Braconidae: Doryctinae: Doryctini) includes eight described species, of which six species are known from the Afrotropical Region (Yu et al. 2012).The other two species are known from China (Taiwan) and Japan (Belokobylskij 1996, Belokobylskij andMaetô 2008).The subgenus Neodoryctes can be separated from the nominate subgenus by the relative length of vein 1-M of the hind wing (1.3-1.8 times as long as vein M+CU in Neodoryctes; 0.7-1.0,rarely up to 1.1, times in Doryctes).In addition, the hind tibia has long erect setae and tergites II+III have sublateral longitudinal grooves.The biology of the species of this subgenus is unknown but members of the subgenus Doryctes Haliday are ectoparasitoids of mainly Cerambycidae and Buprestidae (Yu et al. 2012).The subgeneric status of Neodoryctes is doubtful according to the study of Zaldívar-Riverón et al. (2008); Doryctes and Neodoryctes appeared distantly related according to the molecular analysis thus supporting a generic status for Neodoryctes.

Materials and methods
Twigs of heavily infested Broussonetia papyrifera (L.) L'Hert.et Vent.trees were collected, brought to the laboratory and maintained in a large nylon cage at room temperature.Distilled water was sprayed over the trunks and twigs twice a week in order to prevent desiccation and the emerged insects were collected daily.After the emergence of hosts and parasitoids was complete, all remaining twigs were dissected to record their condition (i.e.status of hosts, and parasitism).The associated host was identified by Dr. Guang-Lin Xie (Yangtze University, Jingzhou, Hubei, China).
For the morphological terminology used in this paper see van Achterberg (1993) and Harris (1979).The descriptions, measurements and figures were made with a Leica M205A microscope.Focused photographs were combined using Leica DFC550 with Leica Application Suite (Version 4.5.0).
The type specimens and hosts are deposited in the Insect Museum, General Station of Forest Pest Management (GSFPM), State Forestry Administration, Shenyang, China.One paratype is deposited at the Naturalis Biodiversity Center (RMNH), Leiden, The Netherlands.
Metasoma (Fig. 13).Length 1.1 × as long as head and mesosoma combined.Tergite I 1.1 × longer than wide apically, with large dorsope, its surface with distinct, uniform and complete striae, and with minute transverse sculpture between striae; medioposteriorly weakly convex and smooth; dorsal carinae conspicuous and half as long as tergite I; apical width 1.6 × its basal width.Tergite II with oblique lateral depressions, medial part of tergite II (between sublateral grooves) distinctly transverse (about twice wider than long medially), tergites II+III 0.9 × as long as its basal width, 1.8 times as long as tergite IV in lateral view; its surface with distinct, uniform and complete striae in basal 0.7, smooth in apical 0.3; second suture hardly impressed, striate and curved.Basal half of tergites IV and V with fine sculpture, and apically (as remaining tergites) smooth.Ovipositor sheath 1.3 × as long as metasoma and as long as fore wing.
Colour.Black.Head brown but stemmaticum and apical half of mandible blackish brown, median part of face and scape yellowish brown with some reddish, apical half of antenna rather dark brown; pronotum, mesoscutum, mesopleuron (apically dark brown) and mesosternum reddish brown; tegula, fore leg (but femur and tibia blackish brown), mid leg (but coxa, femur and tibia blackish brown), hind trochanters and base of tibia, yellowish brown; pterostigma (except for yellowish brown base and apex) and veins blackish brown; sublateral striae of tergite II dark reddish brown.
Male.Length of body 4.2 mm, and of fore wing 2.9 mm.Antennal articles 29, antenna 1.1 × longer than body.Length of mesosoma 2.8 × longer than high.Length of tergite I 1.5 × as long as its apical width and apical width 1.7 × its basal width.Length of tergites II+III 1.8 × its basal width, 2.2 × as long as length of tergite IV.Head (but stemmaticum and apical half of mandible blackish brown; basal half of antenna yellow, apical half brown), fore leg, mid leg (but telotarsus and claws blackish brown), hind leg (but coxa and most of femur yellowish brown with some reddish; telotarsus and claws blackish brown), pterostigma and veins yellowish brown; pronotum and mesoscutum yellowish brown with some reddish; propodeum and metasoma reddish brown and partly blackish.
Variation.Female paratype has length of body 4.6 mm, and of fore wing 3.7 mm.Head (but stemmaticum and apical half of mandible blackish brown; apical half of an-tenna brown), legs except claws blackish brown, tegulae, yellowish brown; pterostigma (but basally and apically yellowish brown) and veins brown; pronotum and mesoscutum yellowish brown with some reddish; scutellum, propodeum, hind coxa and metasoma (but tergites II+III yellowish brown with some reddish), dark reddish brown.
Remarks.The new species belongs to the subgenus Neodoryctes Szépligeti because of the short vein 1-M of the hind wing.It can be separated from other Palaearctic and North Oriental species of this subgenus by having vein 3-SR of fore wing about 1.6 × as long as vein m-cu, apical half of vein M+CU1 of fore wing strongly curved and vein 1-M of hind wing 1.5-1.6 × as long as vein M+CU (vein 3-SR of fore wing about 1.0-1.5 × as long as vein m-cu, apical half of vein M+CU1 of fore wing slightly curved and vein 1-M of hind wing about 1.3-1.4× as long as vein M+CU in the remaining species).It shares with D. slavianka Belokobylskij, 1996, from Korea and Far East Russia, the lack of a dorsal tooth on the hind coxa and the striate or rugose mesoscutum; however, it differs from the latter species by having the medial part of tergite II (between the sublateral grooves) distinctly transverse (about twice wider than long medially; about 1.2 × in D. slavianka), the ovipositor sheath about as long as fore wing (0.60-0.75 ×), the propodeum weakly areolate (distinctly areolate) and vein M+CU1 of fore wing distinctly curved (nearly straight).
Etymology.The specific name is derived from the locality of the holotype.