Tarsus narrower and less than half as long as tibia, v/ith 2 dorsal and 2 

 ventral setae. Claw large, basal seta in form of a straight spine. 



Mid- and hind legs longer and thinner than forelegs; hind legs especially 

 long; large setae also longer. Coxa oblong; one of 2 anterior surface 

 setae situated subdorsally, the other subventrally, almost ventrally on hind 

 legs. Trochanter of characteristic form, flat, oblong; anterior seta small, 

 light; posterior seta thin, moderately long; both posterior ventral setae 

 long, situated some distance from each other, in contrast to forelegs; the 

 apical and intermediate of the 3 anterior ventral setae of midlegs, small, 

 light, basal seta moderately long; all 3 anterior ventral setae of the hind legs 

 long. Femur straight, long, narrow, with differentiated, small, basal part; 

 setae, especially on hind femur, longer than on forelegs; chaetotaxy similar, 

 except ventral setae, which are situated some distance from apex and close 

 together on hind legs. Tibia also straight, long, narrow, thinner than femur, 

 slightly longer than basal part of femur on hind legs; 2 setae dorsally, one 

 dark and long, the other (secondary) short, light brown; 2nd dorsal seta 

 situated some distance from distal setae, longer than other setae of tibia; 

 anterior and posterior seta moderately long, dark, situated near distodorsal 

 seta; the posterior of 2 distoventral setae in form of a blunt, yellowish 

 brown, spine; anterior one with a short base divided into 4 thin, light 

 spinules. Tarsus straight, thin, long; all 4 setae thin, moderately long, 

 situated at distal margin, 2 dorsally and 2 subdorsally; posterior seta of 

 each pair longer than anterior. Claw especially that of hind legs longer and 

 thinner than on forelegs; basal seta in form of a blunt spine. 



Abdominal segment 2 shorter than its following segments; dorsal process 

 large, with rounded apex; lateral processes situated nearer ventral side with 

 thin, yellowish sclerites covered with dense, small hooks. Lateral line on 

 segments 2— 7, with a dense row of short light hairs; a row of small, reddish 

 brown dots on segment 8, each dot with a small seta. Gills at anterior 

 margin of segments 2—8. 



Anterior margin setae of abdominal segment 1 small, brown; anterior- 

 angle setae larger, blackish brown, near a small light secondary seta; 

 407 medioanal setae moderately long; setae of segments 2—7 sn:iall, thin; setae 

 of segment 8, especially medioanal seta, larger than on preceding segments. 



Tergite of segment 9 (Figure 665, A) uniformly brown, with rounded 

 posterior angles; medioanal setae near margin dark, long; a row of 3 short, 

 thin, brownish setae laterally, of them, an anterior -margin seta situated more 

 posteriorly than usual, other 2 are the intermediate and lateral anal setae; 

 anterior-angle seta separated from others, situated laterally. Ventral setae 

 short, dark, thin; lateral seta displaced laterally and smaller than other 2 

 setae. 



Anal legs short, massive; anal slit with a narrow, small, reddish brown 

 stripe. Sclerite "b" convex dorsally, sinailar to a shell of Ancylus with 

 apex turned toward the base of claw; crest of convexity with a groove; a 

 thick, moderately long, black seta subapically; 2 similar setae medial to 

 crest basally and subapically; a short strong seta laterally. Sclerite "c" 

 uniformly brown, with short, dark, basal seta. Claw (Figure 665, B) sharply 

 curved at apex, with 2 small dorsal denticles on curvature. Seta 1 

 situated close to base, reddish brown; setae 2 and 6 long, blackish brown; 

 seta 3 situated above denticles; median seta 4 long, thick, black; ventral 

 setae 7 and 8 yellowish, moderately long; seta 5 small, thin, dark, situated 

 near seta 8. 



510 



