The genera Areopraon Mackauer, 1959 and Pseudopraon Starý, 1975 (Hymenoptera, Braconidae, Aphidiinae) from China, with keys to species

Abstract Two genera, Areopraon Mackauer, 1959 and Pseudopraon Starý, 1975, are newly recorded from China in this paper. Two new species, namely A.chui Tian & Chen, sp. n. and P.hei Tian & Chen, sp. n., are described and illustrated. Keys to the known species of these two genera are provided.


Introduction
The genus Areopraon was erected by Mackauer in 1959 with eight known species at present (Davidian and Gavrilyuk 2011). The species of Areopraon have two types of pupation behavior simultaneously: internal (within the host aphid) and external (under the host aphid) (Starý 1976;Tobias and Kyriac 1971). They usually attack aphids of the families Aphididae (mainly the subfamilies Pterocommatinae, Pemphiginae, and Chaitophorinae) and Eriosomatidae that usually produce a waxy cover and galls on their host plants (Mackauer 1959;Starý 1976).
Pseudopraon is a sister group to Areopraon (Tomanović et al. 2006), and can be clearly separated by having an entirely smooth propodeum (usually having areola or carina in Areopraon), and the absence of vein 1-SR+M of fore wing (at least partly present in Areopraon).
Both Areopraon and Pseudopraon are here newly recorded from China, and two new species, A. chui Tian & Chen, sp. n. and P. hei Tian & Chen, sp. n. are described and illustrated. Identification keys to the known species of these two genera are also provided.

Materials and methods
Specimens studied are deposited in the Parasitic Hymenoptera Collection of Zhejiang University, Hangzhou, China (ZJUH). Descriptions and measurements were made under a stereomicroscope (Zeiss Stemi 2000). All photographs were made by a digital camera (KEYENCE VHX-2000C) with a KEYENCE VH-Z20R lens and processed with Adobe Photoshop CS5.0, mostly to adjust the size and background. Terminology follows van Achterberg (1988), veins follow the modified Comstock-Needham system (van Achterberg, 1979).
Abbreviations used in this paper are as follows: Mesoscutum glabrous, with medial and lateral lobes nearly glabrous, with any setae (Fig. 2C, D); T1 2.3× as long as wide at spiracle level ( Figure 2F); Pterostigma triangular, 3.4× as long as wide ( Figure 2A); Antenna of ♀ with 18 segments (Figure 2I)  Head. Head transverse in dorsal view, slightly wider than mesoscutum, smooth and shiny, with sparse long setae (Fig. 2H). Eyes medium-sized ( Figure 2G), oval, sparsely setose. Temple in dorsal view 1.4 times as long as eye. Malar space equal to 0.15× longitudinal diameter of eye. POL 1.0× Od. Width of face 1.4× its height and 0.4× width of head. Face with several setae. Clypeus oval, raised with several long setae, tentoriocular line equal to 0.3 of inter-tentorial line. Antenna filiform, with 18 segments. F1 approx. 1.3 times longer than F2. F1 4.3× as long as wide, F2 2.5× as long as wide ( Figure 2I).
Metasoma. T1 with medial and lateral carinae, 2.3× as long as wide at spiracle level, with two long setae each side close to spiracle ( Figure 2F). Ovipositor sheaths glabrous, except the apex ( Figure 2K).
Colour. Head dark brown, face somewhat paler, clypeus and mandibles yellowish to light brown. Maxillary and labial palpi white to yellowish. Antennal scape, pedicel and F1 yellowish to brown. The ventral view of mesosoma and propodeum brown. Wings hyaline with brown venation. Legs yellowish to light brown, apices of tarsi dark. Remainder of antenna and mesosoma dark brown. Metasoma and ovipositor sheath brown.
Male  Starý, 1981, by having T1 very long, but can be separated by the differences listed in the above key. It is also similar to A. thailandicum Starý, 2008, by having the mesoscutum nearly hairless, but can be distinguished by having the vein m-cu of fore wing distinctly present (the latter completely absent) and the antenna 18-segmented (the latter 12-segmented).
Wings. Fore wing: apical margin with long setae, which are longer than setae on wing membrane. Pterostigma triangular, 3.4× as long as wide. Distal abscissa of 1-R1 (= metacarp) 0.7× as long as the length of pterostigma. Vein r+3-SR (= radial vein) slightly longer than the width of pterostigma, shorter than 1-R1 (5:7), do not reach the wing apex. 1-SR+M totally absent. Vein m-cu+2-M feebly pigmented, but distinctly present ( Figure 3G). Hind wing with a complete cell, apical margin with long setae, which are longer than setae on wing membrane.
Metasoma. T1 nearly smooth, 1.2× longer than width at spiracle level, with long setae close to lateral corners. Ovipositor sheath with some long setae and its apex obtuse ( Figure 3J).
Colour. Head dark brown, face somewhat paler, clypeus and mandibles yellowish to light brown. Maxillary and labial palpi white to yellowish. Antennal scape, pedicel and F1 yellowish. Remainder of antenna and mesoscutum dark brown. Wings hyaline with brown venation. Legs yellowish to light brown, apices of tarsi dark. Metasoma and ovipositor sheath dark brown to brown. . n. A head, anterior aspect B head, dorsal aspect C mesonotum, dorsal aspect D propodeum, dorsal aspect E T1, dorsal aspect F habitus, lateral aspect G fore wing H antennae I hind wing J ovipositor & ovipositor sheath, lateral aspect K metasoma, lateral aspect L mesosoma, lateral aspect. Scale bars: 0.2 mm.

Male. Unknown.
Host. Unknown. Material examined. Holotype: ♀, S China, Yunnan, Kunming, 30.III.1981, He Jun-Hua, No.811140. Distribution. China (Yunnan). Taxonomic remarks. This species is the second known species of this genus and can be easily differentiated from the type species, P. mindariphagum Starý, 1975 by having the flagellomere of antenna with more segments and the apex of ovipositor sheath sparsely setose (versus densely pubescent).
Etymology. The new species is named in honour of Prof. Jun-Hua He (ZJUH), who also collected the holotype, for his valuable contribution to the taxonomy of parasitoid wasps in China.