Bamboosiella magnus sp.n.

(Figs 9, 14, 24, 37, 44, 55)

Female macroptera. Large body, bicoloured (Fig. 55); head brown, thorax yellowish brown, but distinctly lighter than head; abdominal segments I–V yellow, VI–VII yellowish brown to brown, median areas faintly shaded, IX–X brown; antennal segments I–II and IV–VIII brown, II yellow at apex, III and base half of IV–VI yellow (Fig. 14); all legs brown except yellow fore tibiae; fore wings slightly shaded.

Head almost 1.5 times as long as wide, slightly constricted at base, dorsal surface smooth with weak sculpture posteriorly; postocular setae well developed, longer than eye, pointed apically (Fig. 9); cheeks with about 6 pairs of spinous setae; mouth-cone short and pointed, maxillary stylets wide apart, restricted to mouth-cone; antennae about 2.0 times as long as head, VIII narrowed to base, III and IV with 1+1 and 1+2 1 sense cones respectively (Fig. 14). Pronotum smooth, 4 pairs of major setae well developed, pointed to blunt apically, am reduced to minute setae (Fig. 9); notopleural sutures complete; basantral plates absent; mesopresternum complete, broadened at middle; metanotum smooth, median setae well-developed, pointed apically; metathoracic sternopleural sutures absent; fore femora enlarged, fore tarsal tooth large; fore wing constricted at middle, with 5 duplicated cilia, subbasal wing setae well developed, S1 slightly shorter than S2, S3 the longest, pointed apically (Fig. 44). Pelta hat-shaped (Fig. 24); abdominal tergites II–VII each with two pairs of wing retaining setae; tergite IX setae S1 as long as S2, S3 the longest, slightly longer than tube with apices pointed (Fig. 53); tube slightly shorter than head, anal setae almost as long as tube (Fig. 53).

Measurements (holotype female). Body length 2900. Head length 320, from anterior margin of eyes 290, width across eyes 210; eye length 120; antenna length 590, segments I–VIII length (width): 50(40), 60(35), 95(35), 100(30), 95(30), 80(25), 60(20), 45(15). Pronotum length 210, width across median part 310; length of major setae: aa 40, am 10, ml 70, pm 10, pa 110, epim 90; fore femur width 160; fore wing length 1200, subbasal setae S1–S3 length: 60, 80, 130. Pelta length 110, width at base 140, width at apex 55; tergite IX length 120, S1–S3 length 220, 280, 300; tube length 230, width at base 90, at apex 40; anal setae length 250.

Male macroptera. Similar to female, but smaller body, length 2400; fore femora weakly enlarged, fore tarsal tooth smaller; tergite IX S2 short and stout, S1–S3 length 200, 75, 230.

Material studied. Holotype female, China, Hainan, Wenchang County, 11.iv.1958, leaves of bamboo, Xiangling Meng ; paratypes: 22 females and 9 males with same data as holotype, 1 female, 1 male, 4& 9.iv.1958, Xiangling Meng.

Etymology. This species is named in one Latin word, “ magnus ”, based on large body.

Comments. The new species is similar to the Japanese B. lewisi (Bagnall) in body shape, but they can be distinguished by the body colour and body setae. In the species described above the body is bicoloured and all setae are extremely pointed, whereas in lewisi the body is uniformly brown to dark brown and major setae are blunt or expanded. This new species is also resembles fasciata and bicoloripes in the large body and head as well as elongate antennal segments, but these species can be distinguished by the above keẏ