fingerlike process, with a dark spot at the base; seta of trochantin situated 

 on the membranous apex of the process; two small setules situated more 

 ventrally on the membrane. 



Pleurites of meso- and metathorax reduced to two small sclerites, 

 perpendicular to each other; the small anteriorly-directed sclerite is a part 

 of the episternum and the trochantin is fused with it (Figure 188); seta of 

 214 trochantin situated near the sclerite, at the base of the gill; seta of epimeron 

 small, situated on a membrane. 



Legs (Figure 189) short; relative length 95:300:112. They are brownish 

 yellow; coxae slightly darker, with a black, beak -shaped process at the basal 

 margin; dorsal setae of coxae situated in the basal part, near the apex of 

 the deep distodorsal notch; trochanters and femora with a narrow 

 membrane ventrally (Figure 190). 



The 3 dorsal setae of the forecoxa, dark and thick; anterobasal seta 

 longer and stronger than the others, the posterior seta thinner; both anterior 

 surface setae small and thick; one seta is displaced towards the basal setae; 

 distoventral setae small, thick, spinelike; anterior seta smaller than the 

 posterior seta. 



Anterior and posterior setae of trochanter, short and thick; all 3 anterior 

 ventral setae situated on the sclerite; basal seta thick and spinelike; apical 

 seta situated at the apex, light and small; both the posteroventral setae 

 situated on a membrane, one in about the middle of the segment, the second 

 further distally and longer than the others. Basodorsal seta of femur 

 shorter than apical dorsal seta which is slightly displaced posteriorly and 

 moderately long; anterior surface seta small, and spinelike; posterior seta 

 short and dark; both setae situated distally; anterior basoventral seta 

 small and spinelike, situated on a membrane; posteroventral seta situated 

 on the sclerite, dark and short. All 6 setae of the tibia thin and short, the 

 subapical dorsal seta shorter than the apical seta; the 4 setae on the tarsi 

 are situated distally; they are small and thin; the two dorsal setae are 

 situated close together; posterior seta longer than anterior seta. Claw 

 thick and short; basal seta in form of a small, dark, blunt spine (Figure 1 91 ). 



Mid- and hind legs less massive; femora, tibiae and tarsi longer. 

 Anterior dorsal basal seta of coxa not longer than the other two as on the 

 forelegs, but shorter and thinner; anterior surface setae and the disto- 

 ventral setae slightly longer and situated subapically; only the anterobasal 

 seta of the 5 ventral setae of the trochanter is situated on the margin of the 

 sclerite; the other 4 are situated on the membrane; posterior subapical seta 

 longer than the others; setae of femur of similar length; distobasal 

 anterior surface seta and posteroventral seta slightly longer than on the 

 forelegs; basal dorsal seta thicker, setae of tibia and tarsi are thin and 

 markedly longer than on the forelegs; claw longer and thinner; its basal 

 spine is blunt. 



The anterior -angle dorsal seta of the first abdominal segment is very 

 small and light; this seta and the median dorsal seta on segments 2—8 are 

 small, thin and longer than the others; the seta at the anterior margin, the 

 dorsal intermediate and dorsolateral seta and the lateral setae are small; 

 the intermediate seta of the 3 ventral setae which is absent on the first 

 segment is longer than the others on the 2nd to 8th segments, about one third 

 of the length of the longest dorsal abdominal setae. 



222 



