Both sclerites of trochanter open dorsally, their ends pointed; anterior 

 surface seta of forelegs represented by a coarse feathered spine; repre- 

 sented on midlegs and hind legs by a black spinelike Seta; posterior surface 

 seta of trochanter of all legs long; both posterior setae of the 5 ventral 

 setae long and situated subapically; 3 anterior setae small and thin; basal 

 seta situated near the suture and slightly larger than the other. 



Both dorsal setae of femora long; anterior surface seta of femur of 

 forelegs short and dark, spinelike, that of midlegs and hind legs, long, like 

 the posterior surface seta; ventrodistal seta long; ventrobasal seta situated 

 in the middle of the segment, thin, spinelike and slightly curved. 



Anterior seta of the tibiae displaced toward the dorsal seta, forming a 

 group of 3 long, black distodorsal setae; posterior seta and ventral setae 

 forming a group of 3 small, distoventral setae covered with spinules; the 

 setae at the sides are spatulate (Figure 374) and their margin is fringed 

 with hairs. 



Dorsodistal setae of tarsi dark, longer than the small, light, distoventral 

 setae, with small pointed spinules at the base of the setae. 



Claw strong, with a small process at the base of the basal seta; basal 

 part of claw darker than distal part. 



Anterior -angle, anterior -margin and medioanal setae of dorsum of 

 abdominal segments 1—8 relatively large; secondary anterior-angle setae, 

 intermediate and lateral seta small. Both setae of the pleura of abdominal 

 3^3 segment 1 long; only the posterior seta is long on segments 2 and 3; anterior 

 lateral seta of segments 2 and 3 and both setae of segments 4—7 small 

 and pale; outer, lateral seta of segment 8 displaced to the dorsal side and 

 situated near the row of setae formed by the anterior -angle seta and the 

 3 dorsal surface setae. Middle and lateroventral seta on the 1st and 

 2nd segments longer than the others which are thin and small; the inter- 

 mediate seta is the longest on segments 7—8. 



Dorsal sclerite of segment 9 dark brown, trapezoidal, almost completely 

 covering the dorsum (Figure 3 76); anterior -margin setae small and setuli- 

 form; 5 setae on each side near the posterior margin, 3 posterior surface 

 setae, an anterior -angle seta and a lateroventral seta, which is situated at 

 the margin; except for the short and thin intermediate seta, setae at 

 posterior margin dark, blackish brown and long. Anus with 2 lateral folds; 

 6 anal gills. 



Anal legs short and thick, directed obliquely ventrally. Sclerite "b" dark 

 brown, large, covering the dorsal and lateral sides of the anal leg and part of 

 the ventral side; large spots laterally, near the anterior margin; the claw 

 articulates with a black sclerite at the distal margin; 4 dorsodistal setae of 

 sclerite "b" black, relatively long, forming a fan. The wide, convex sclerite 

 "c" extends ventromedially and bears 2 thin pale setae. 



Claw with a wide base and its tip bent at a right angle with 4 small dorsal 

 denticles; denticles and the apical part of the claw yellowish brown. In 

 addition to setae 1, 2 and 3, setae 4 and 6 are displaced to the dorsal side 

 of the claw; seta 5 absent;* seta 8 situated on the membrane of the trans- 

 verse stripe; transparent, shorter and thicker than the others; seta 7 long. 



Case of full-grown larva (Figure 377) built of fine and coarse sand grains; 

 it consists of a rooflike convex upper side and a flat, lower side; openings at 

 the anterior and posterior end of the case are similar, in form of short 



* Nielsen (1942:369) states that this seta is displaced to sclerite "c." 



341 



