The discovery of Tetracampidae (Hymenoptera) from China with a description of a new species.

Two species belonging to Mongolocampinae (Tetracampidae) were reared from the leaf galls of Nitraria tangutorum Bor. (Zygophyllaceae) in Ningxia by Prof. Gao Zhaoning. After a careful study by the author, one of them is found to be new to science and the other new to China. This is the first discovery of the family appearing in China. They are briefly described below. The type specimens of the new species are deposited in the Entomological Museum of Northwestern Agricultural University, Yangling, Shaanxi:1. Platyneurus baliolus Sugonjaev, 1974 (Figs. 1 - 6)Specimens examined: 115 (?) (?) 68 (?) (?) , Lingwutan, Ningxia, 1988-Ⅴ-10, reared by Gao Zhaoning, from leaf galls of N. tangutorum, which were caused by Aphaniosoma sp. (Diptera, Chiromyiidae).2. Mongolocampe zhaoningi Yang, sp. nov. (Figs.7-13)Female. 1.5-1.8 mm long. In natural dried specimens head and gaster collapsed seriously, especially frons, even eyes collapsed towards the sunken part. Head and thorax dark green with metallic luster . In normal specimens a yellow spot situated at upper innner orbit and before lateral ocellus. Gaster lemon-yellow with lateral sides having dark bands and venter darkened largely. Eyes purple red, bare. Antennal scrobes connected and not deep, with strong violete luster. For dimension of head in dorsal view see Fig. 8. Head without occipital carina. Interantennal toruli convex as a low crest. Distance between toruli as long as a torulus diameter. Toruli just on lower ocular line. Face receding towards oral fossa with some short hairs. Crescent clypeus with four bristles on apex. Tongue-like labrub two times as long as clypeus, yellow in color. Breadth of oral fossa slightly less than 1 / 2 of head maximum width (11: 23). For antenna see Fig. 9. Thorax stout and convex moderately with thin and sparse hairs on the surface. Pronotum short and lower than mesoscutum. Notauli very superficial but complete. Distance between ends of notauli nearly 1 / 2 the breadth of mesoscutum (17 : 37) and, therefore, the mid lobe much bigger than the side lobe. Axillae slightly protruding medially, not connected at base of scutellum. Scutellum large, subro'unded, with width about 7/10 and length about 1.2 times of mesoscutum respectively. Dorsellum narrow. Propodeum short, its middle length not reaching 1 / 5 of scutellum (5 : 23); slightly convex in the middle and gradually receding towards its lateral sides, without any carina; spiracle near front margin with a distance just about its longitudinal diameter. For curiouos wings see Figs. 11-12. Legs well devedloped, all tibial apices with only one spur shorter than basitarsus except mid tibia with its spur longer than basitarsus. Gaster lanciolate, in dried specimens, without petiole, its length distinctly longer than length of head plus thorax combined (90 : 66).Male. 1.2-1.5 mm long. For antenna and forewing see Figs. 10,13. Gaster length subequal to head plus thorax combined.Holotype (?) , paratypes 2 (?) (?) 6 (?) (?) , data same as the above species, Platyneurus baliolus.The new species resembles M. kozlovi Sugonjaev, but may be easily separated by the characters below: 1) Female with eyes smaller, so temple distinct, its length more than 1 / 6 of eye in dorsal view (1.2 : 6.0) (the latter almost without temple); 2) antennae of male and female having funicles 3-5 about as broad as long (the latter having those obviously transverse); 3) the expanded vein of male close to base of forewing and its surface with reticulate patterns, the post marginal longer tnan the stigma vein and with an angle between two veins only about 10°?(Fig. 13) (the latter with post marginal vein much shorter than the stigma, and the two veins with an angle about 45° ?).