关键词: 膜翅目, 蚁科, 尖尾蚁属, 分类

Abstract: Three species of the ant genus Acropyga (Hymenoptera: Formicidae) are found in China. Among them one is new to science. A key to the Chinese species of Acropyga is presented. The type specimens are kept in Insect Collection, The Forest Research Institute,The Chinese Academy of Forestry.Acropyga (Atopodon) jiangxiensis n.sp. (figs. 1—4)Worker (Holotype cited first): total length (TL) 2.0, 2.0—2.1; head length (HL) 0.58, 0.57—0.61; head width (HW) 0.47, 0.46—0.49; scape length (SL) 0.37, 0.37—0.42; head index (HI) 81, 79—83; scape index (SI) 79, 76—91; Weber's length of alitrunk (WL) 0.51, 0.49—0.54. (Unit: mm, Five individuals were measured)Head slightly longer than wide, with slightly convex sides and shallowly concave occipital border. Mandibles subtriangular with 5 teeth. The apical 3 teeth smaller and poited, the 4th larger than the 3rd, slightly smaller than the apical 2; basal tooth heavy and truncate. Eyes smalle, 0.03mm in maximum diameter. Antennae 11-segmented; 10th as long as broad} last segment 2.1—2.9 × as long as broad. Clypeus convex, without median crina; its anterior border slightly convex. Frontal area distinct, subtrian-gular. Maxillary palpi 2-segmented; labial palpi 3-segmented.Lateral view of the alitrunk convex, propodeum very sloping; pro-mesonotal and mesonotal-propodeal surture distinct. viewed from the above, pronotum 1.5—2.0 × as broad as long, petiole with the general shape.Head, alitrunk and gaster shagreened. Mandibles shining, with some shallow punctures. Clypeus with sparsely punctures. Anterior part of head with several long haires. Anterior border of clypeus with no more than 3 long hairs. Suberect hairs abscent on other part of the head and antennae. Alitrunk with several pairs of erect hairs. Apex of petiole node without erect hairs or with 1 to 2 hairs. The whole body covered with dense pubescence.Color white to pale yellow; with the tibiae, antennae and mandibles reddish; mandible teeth reddish brown.Male: TL 2.4: HL 0.37—0.41; HW 0.25—0.33; SL 0.28—0.29; HL 68 —80; SI 89—110; WL 0.75—0.76. (Two individuals were measured)Head longer than wide. Eyes large and very convex, 0.16—0.18 mm in maximun diameter. Mandibles 4 teeth, the apical 3 sharp poited, basal tooth large, more round, not rectangular. Antennae 12-segmented, the 2nd 2.3—2.7 × as long as broad, 3th-llth longer than wide, or approximatedy as long as broad. Ratio of length from 10th segment to last one, 4:5:14. Maxillary palpi 2-segmented, slender. Labial palpi 3-segmented.Dorsal outline of alitrunk round, petiole node thin. Wing veins as in figures.Body subopaque with sparse punctures, covered with dense pubescence. Mandibles with several long hairs. Gaster with sparse hairs.Color pale yellow, slightly brownish, Area near ocelli blackish brown. Terminal antennae segment a little darker than the others. Mandible teeth reddish brown.Holotype: worker, 11. Ⅸ. 1989, Dagang Mt., Fenyi County, Jiangxi Provin., Wang Changlu leg..Paratypes: 14 workers, 2 males, same as the holotype.This species resembles closely with A. baodaoensis Terayama, but differs from the latter in the following characters of worker: l.Head and antennae without numerous suberect hairs, anterior border of clypeus with no more than 3 long hairs, apex of petiole with 1—2 hairs or without hairs. 2. Clypeus without median crina. 3. Vertex without large dark subtriangular spot. 4. 4th tooth not distinctly larger than the apical 2. Male of the new species differing in the following characters: 1. Second segment of antennae 2.3—2.7 × as long as broad (3.0× as long as broad in baodaoensis). 2. Terminal mandible tooth triangularshaped.

Key words: Hymenoptera, Formicidae, Acropyga, Taxonomy