dark. Abdominal segment 1 with 2 ventral setae; median seta thick, long, 

 dark, near anterior margin of segment; second seta (apparently lateral) 

 small, dark, situated on the anterior ventral gill some distance from the 

 base of the gill. 



Abdominal segments 2—8. Anterior -margin dorsal seta small, thin 

 (Figure 12); anterior -angle seta slightly larger on segnaents 2 — 3 

 situated near the anterior-margin gill, on the following segments situated 

 gradually more posteriorly toward the middle, on a small, sclerotized 

 dot. Medioanal seta dark brown as on segment 1, relatively large on 

 segments 7 and 8, long, thick, at the base, situated on a large, dark 

 sclerotized dot; intermediate and lateral setae small, situated some distance 

 from the medioanal seta on segment 2 gradually closer to medioanal seta on 

 the following segments. Lateral line absent on segment 2, the lateral setae 

 small, black, situated one behind the other, the anterior seta shorter and 

 „p. thinner than posterior seta. Lateral setae of following segments brown, 

 slightly thickened, situated among the chaetae of the lateral line. 

 Ventromedian seta small, thin, situated near anterior margin; lateral 

 seta small, black, situated behind anterior ventral gill; intermediate seta 

 the largest on the ventral side, dark, thick, situated in posterior part of 

 the segment. 



Dorsal side of segment 9 with a small, yellowish brown median sclerite 

 posteriorly (Figure 13) with dark dots near anterior margin; posterior 

 margin of sclerite with a thick, blackish brown, long medioanal seta, 

 flanked by short, light, intermediate and lateral anal setae; anterior - 

 margin seta situated before the intermediate seta, small, thin, displaced 

 posteriorly, sometimes absent on one side; anterior -angle seta short, 

 reddish brown, situated on a large sclerotized dot on the membrane near 

 posterior angle; all 3 ventral setae situated in posterior part of segment, 

 intermediate seta thick, black, longer than on the preceding segments, 

 median seta small, situated more anteriorly, lateral seta small, thin. 



Anal legs short; sclerite "b" yellowish brown, covering lateral and 

 outer dorsal parts of the anal leg and part of the ventral side, where it 

 forms a narrow mediobasal process; a reddish to dark brown spot dorsally 

 near base of claw, 3 long, thick blackish brown setae, near posterior margin 

 of spot, one of them slightly shorter and thinner than the others; a short, 

 dark seta ventrally on the outer side. Sclerite "c" relatively large, with a 

 small dark seta. 



Claw (Figure 14) curved at a right angle, with 3 small denticles dorsally 

 at the curvature; dorsal seta 1 small, thick; seta 2 larger, situated near 

 dorsal margin of membranous bar; seta 6, situated nearby, laterally, 

 short, thick; seta 3 situated distally, the longest on the claw; setae 7 and 

 8 situated ventrally near the base, yellowish, short; seta 5 short, situated 

 laterally near seta 8; seta 4 small, situated medially near seta 8. 



Case (Figur e 1 7 ) usually consisting of a stalk of Phragmites 

 communis or Scolochloa festucacea, open on both sides, slightly 

 larger than the larva; rarely, as in Ph ryg an e a, covered with small plant 

 fragments arranged in a spiral. 



Pupa. Length of male pupae 16— 17 mm, of female 20—22 mm. Antennae 

 reaching segment 8—9 in male pupae, segment 4—5 in female pupae. 

 Labrum and anteclypeus about as long as wide or slightly longer than wide. 



26 



