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nearby; a large, black seta with filiform end distal to the spine; it is 

 absent on the midlegs; in contrast to those on midlegs, the setae of the 

 posterior surface row are long and filiform. Hind tarsus without distodorsal 

 setae of the midleg, but with a brown subapical dorsal seta which is longer 



and thicker than the others. Claw 

 slightly longer and narrower than 

 on midlegs. 



Abdominal segment 1 with large 

 dorsal and lateral processes. 

 Lateral line present on segments 

 3—8; gills on segments 1—8, with 

 4-23 filaments (Figure 131, A), 

 dorsally and ventrally, also on 

 pleural segments 2—3. 



Sclerite of segment 9 yellow, 

 with pale, indistinct grayish dots; 

 medioanal and anterior -angle 

 setae black, long; intermediate 

 and lateral setae short, thin; a thin, 

 secondary seta between the medio- 

 anal setae, sometimes accompanied 

 by a small seta. 



Sclerite "b" of anal legs yellow; 

 setae black; mediodistal angle seta 

 thick, the longest on the sclerite, 

 together with 2 other setae at the 

 distal margin; a thick, long, seta 

 and a distal outer seta which is 

 thinner, and moderately long; ventral seta short, thin; 2—3 small setae on 

 dorsal surface. Sclerite "c" yellow, with blackish outer stripe; seta small, 

 reddish brown. Claw light, with dark apex, dorsally with 2 denticles one 

 above the other; seta 1 short, 2 and 3 long; seta 6 small, situated on outer 

 side of distal part; seta 4 small, near 8; seta 5 on outer side, slightly 

 larger; setae 7 and 8 light, straight, close together, situated basally. 



Case 16— 18 mm long, slightly curved, with smooth surface, made of 

 large, flat plant particles arranged symmetrically in a mosaic; posterior 

 end covered with fine plant particles, with large opening in the middle 

 (Figure 131, B). 



Pupa. Length 16 mm. Antennae reaching middle of abdominal segment 

 5, scape with 7 small setae. Labrum light, soft; setae relatively short; 

 anterior pair marginal, smaller than the others. Mandibles with wide 

 basal part; distal part narrower, slightly curved at the base; median blade 

 coarsely serrated; outer setae thick, of the same length. 



Wing sheaths reaching abdominal segment 3. Mid -tarsi with short, 

 sparse setae on segments 1—4; setae sparser on the 2 proximal segments 

 of hind tarsi, sometimes also on 3rd segment. Holding apparatus on 

 abdominal segments 3—7; number of spinules: 111:2—3; IV: 2—3; 

 V:2-3+5-7; Vl:2-3; VIl:2-3. Lateral line on segments 5-8 with 

 short, dense setae; segment 4 posteriorly with several small setae. 

 Gills as in the larva. Segment 9 short, with 9 large setae near posterior 



FIGURES 131 and 132. Ironoquia dubia Steph.: 



131 — ventral gill of abdominal segment 4 (A), larval 

 case (B) ; 132 — posterior end of female pupa, ventral. 

 (131, A - after Siltala; 132 - after Dohler). 



94 



