Pupa. Length of female pupae 6.0—6.6 mm, of male pupae 5.8—6.3 mm. 

 Antennae of female pupae reaching segment 9, antennae of male pupae not 

 coiled, slightly longer than body. Labrum with numerous, upward-directed, 

 golden brown setae; primary setae not so much longer as in Hydropsyche. 

 Anteclypeus with lateral tufts of setae like those on labrum. 



Mandibles thinner than in Hydropsyche; left mandible with apical 

 tooth and 4 other teeth, right mandible with 3 teeth; denticulate part of 

 mandible with fine serration. Outer primary setae situated about in the 

 middle of the apical part, thin, golden brown; a tuft of strong golden brown 

 setae ventrally near base. 



Wing sheaths tapering, pointed, reaching abdominal segment 6. Natatorial 

 setae present on first 3 tarsal segments and partly on 4th segment of 

 midlegs. 



Presegmental plates present on abdominal segments 2—8, postsegmental 

 plates on segments 3 and 4; number of spinules much smaller than in 

 Hydropsyche. Postsegmental plates of abdominal segment 3 rounded, 

 516 with a few pointed spinules; postsegmental plates of segment 4 broadly 

 elliptical; spinules form a transverse row in middle; spinules of pre- 

 segmental plates of segments 5 and 8 situated on sides of sclerites; their 

 number as follows: 11:4-5; 111:4-6+15-20; IV:3-4+6-12; V:2-3; VI:2-3; 

 VII:3; VIII:2-3. 



Pupal gills less numerous than in Hydropsyche; number of filaments 

 of ventral gills given in Table 24. 



(515) 



TABLE 24 







Intermediate 





Segment 



















lateral 







median 



2 



7 







7 



3 



8 







8 



4 



8 







8 



5 



5-8 







3-7 



6 



4-6 







4-5 



Pleural teat-shaped gills large, with a wide base and long, thin end, 

 present on segments 3—7; segment 3 with 1 gill; segments 4—7 with 3 gills 

 situated one behind the other. 



Genital appendages of male pupae curved, pointed, not contiguous. 



Pupal case about 8— 10 mm long, built of sand grains or small stones and 

 fragments of plants, roots, leaves or wood. 

 517 Mode of life and habitats. Rivers and rivulets, mainly in 

 foothills, on stony bottom, bottom covered with pebbles or on solid sand 

 bottom. The larvae are known from the Southern Bug, Dnieper; rivulets of 

 the Psekups, Zanga, Rion, Araks; rivulets on the Kola Peninsula, and the 

 Varzob River in Middle Asia. 



Distribution. Northwest, west, southwest and south of the European 

 USSR, the Caucasus, Middle Asia. In addition, Europe, Iran, North Africa. 



590 



