An illustrated key to the genera and subgenera of the Alysiini (Hymenoptera, Braconidae, Alysiinae), with three genera new for China

Abstract An illustrated key to the genera and subgenera of the Alysiini (Hymenoptera, Braconidae, Alysiinae) from China is presented. Three genera new for China are reported: Adelurola Strand, 1924, Anisocyrta Foerster, 1863, and Pentapleura Foerster, 1863. The total for China is 26 genera of Alysiini and an additional seven subgenera (excluding the nominal subgenera, which are included in the total of genera). The known Chinese species are listed under each genus and the biology is summarised. Separatatus sinicus (Zheng, Chen & Yang, 2012) and Grammospila eurys (Chen & Wu, 1994) are new combinations. Regetus Papp, 1999, and Adelphenaldis Fischer, 2003, are new synonyms of Eusynaldis Zaykov & Fischer, 1982. In addition, Eusynaldis Zaykov & Fischer and Synaldis Foerster, 1863, are treated as subgenera of Aspilota Foerster, 1863, and Dinotrema Foerster, 1863, respectively. An aberrant species of Separatatus Chen & Wu, 1994, S. parallelus sp. n., is described from Yunnan and Hainan.


Introduction
-Vein M+CU of hind wing distinctly shorter than vein 1-M (aa) or vein cu-a absent (bb); third antennal segment usually shorter than fourth segment (cc); marginal cell of fore wing reaching wing apex (dd) ..... Asobara Foerster, 1863 -Head transverse and at least 1.7 times as wide as long in dorsal view (aa); if rarely about as long as wide or longer than wide then first tergite with normal dorsope (dd); mandible at most with narrow gap between first and second tooth (bb), and second tooth without distinct dorsal tooth (cc); first tergite (compared to base of tergite) at most weakly constricted near basal third (dd  Chen & Wu, 1994, belongs to Grammospila (comb. n.); it

Notes. Adelurola eurys
Biology. Large genus, containing parasitoids of Phoridae and Platypezidae (in mushrooms). The host records of Anthomyiidae and Drosophilidae are probably erroneous.

Synonym. Euphaenocarpa
Leptotrema van Achterberg, 1988a: 42; Chen and Wu 1994: 94;Belokobylskij 1998: 219. Type species: Aspilota dentifemur Stelfox, 1943. Synonym. According to Wharton (2002) this is a synonym of Dinotrema Foerster, 1863. However, the vertical malar suture excludes it from Dinotrema Foerster. A future DNA-analysis is needed to find its position within the Aspilota-group. Biology. Small genus of which the biology is unknown, but belongs to the Aspilotagroup containing parasitoids of Phoridae.
Mesosoma. Length of mesosoma 1.3 times its height; mesoscutum without lateral carina in front of tegula (Fig. 3); precoxal sulcus absent; mesopleuron smooth and glabrous; pleural sulcus crenulate; episternal scrobe small, connected by a furrow to pleural sulcus; metapleuron smooth except some ventral rugae, with long setae and a round large pit anteriorly (Fig. 3); notauli only anteriorly impressed on disc, narrowly crenulate and medio-posteriorly with deep longitudinal depression; mesoscutum with some setae anteriorly and near notauli; scutellar sulcus deep and narrow, with 4 short longitudinal carinae and 6 times wider than its maximum length; scutellum rather flat and wide (Fig. 4); surface of propodeum with rather long median carina, without areola absent and with some rugae anteriorly (Fig. 5).
Variation. Males are similar to females, but have 35(1) antennal segments (according to the original description females have 31 or 32 segments); body length of ♂: 3.7-4.2 mm, length of fore wing 4.1-4.7 mm, width of head 1.9-2.0 times its lateral length.
Mesosoma. Length of mesosoma 1.4 times its height; mesoscutum without lateral carina in front of tegula (Fig. 18); epicnemial area smooth except for a few crenulae; precoxal sulcus wide, with distinct crenulae medially, but anteriorly and posteriorly absent; remainder of mesopleuron smooth and glabrous; pleural sulcus narrowly crenulate; episternal scrobe small, connected by a furrow to pleural sulcus; metapleuron reticulate-rugose but smooth medially, with long setae and a round large pit anteriorly (Fig. 18); notauli wide, only anteriorly impressed on disc, widely crenulate and medio-posteriorly with a shallow, round depression; mesoscutum with some setae along notauli; scutellar sulcus deep and narrow, with one median carina and 2 short longitudinal carinae and 4.0 times wider than its maximum length; scutellum rather flat and wide (Fig. 19); surface of propodeum rugose, with rather distinct median carina on anterior half, areola present but inconspicuous (Fig. 20).
Metasoma. Length of first tergite 0.7 times its apical width, its surface longitudinally striate, its dorsal carinae widely separate (Fig. 20); second tergite of metasoma with longitudinally striate anteriorly; laterope present; dorsope rather large (Fig. 21); setose part of ovipositor sheath 0.26 times as long as fore wing (total visible sheath 0.35 times), flattened and sparsely setose and 0.8 times as long as hind tibia.
Variation. Male is similar to female; body length of ♂ 2.3 mm, length of fore wing 2.4 mm, width of head 2.0 times its lateral length.
Notes. The new species can be separated from all known species by the parallelsided and long basal part of the pterostigma, vein r of fore wing comparatively close to the apex of the pterostigma and vein 3-SR of fore wing about 2.9 × as long as vein r.