ivith descriptiuns of two ncio species from Formosa. 3G5 



bearing on the other ; in the anterior pair, the outer posterior surface 

 is bare ; in the middle and posterior pairs the anterior surface is 

 bare. Lower edges of the femora curving up a little abruptly at 

 their distal ends. Tibia3 with bristles on the upper edge, and 3 

 cross rows of strong dark bristles on the lower edge distally. There 

 are one or two very long outstanding bristles on the lower edge of 

 the femur and the ujjper edge of the tibia. 



Abdomen of the ^. (Fig. 9.)— Long and narrow. Excluding the 

 anal segment, 5 distinct tergites can be seen, but the basal one is 

 longer, and really consists of two segments partially fused together, 

 the line of division between them being visible in some aspects : I 

 shall, however, consider them as a single tergite, no. 1 (Fig. 9a). 



This Tergite 1 with numerous very short bristles on its surface, 

 rather longer ones on its hind margin. Tergite 2 with few bristles 

 on its surface ; with bristles of varying lengths, some fairly long, on 

 its hind margin. Tergite 3, 4, 5 bare on the surface, their hind 

 margins set with short stiff spines, alternating with every two or 

 three of which are long bristles, the 4 nearest the middle line being 

 very long. Anal segment strikingly long and narrow (about If 

 times as long as broad), not tapering ; the surface in the middle bears 

 a very few scattered short stiff bristles, and there are a few more 

 such bristles, alternating with rather longer ones, on the hind 

 border. 



Basal sternite somewhat impressed along the middle line, with 

 not very short bristles on its surface ; ctenidium well developed, the 

 teeth close, shorter in the middle, so that the oiitline of their apices 

 appears sinuate. Sternites 2, 3, 4, without very definite marginal 

 rows of bristles, but with rather scattered strong bristles (some on 

 the surfaces as well as on the margins) mostly of moderate length, 

 some of those at the sides being very long. Sternite 4 bears in the 

 middle part of its hind margin, about 4 stiff spines rather far apart. 

 Claspers (Fig. 10) long, slender, slightly curved outwards in the distal 

 half, curved in again at the apices, which are dark. 



Abdomen op the 9 • (Figs- H and 12.) — Rather long and narrow. 

 Excluding the anal segment, 3 dorsal plates (tergites) are distinguish- 

 able. Tergite I (Fig. 11a) small, with very short fine bristles on the 

 surface, slightly longer at the hind margin. Tergite 2 (Fig. 116) in 

 some specimens bare, in others with very short bristles, on its surface ; 

 hind margin bearing very long fine bristles and some small short 

 spines. Between tergites 2 and 3, an area of whitish extensible skin 

 bearing numerous rather strong short bristles, longer at the hind 

 margin. Tergite 3 (Fig. lie) a bare chitinous plate, bearing only 4 

 very long outstanding bristles far apart, and strong short spines along 

 its hind margin. Anal segment composed of two lateral pieces — with 



