58 



59 



Sclerite "b" of anal legs yellowish brown, slightly darker near distal 

 margin, with groups of reddish brown dots dorsally and laterally; 3 long, 

 distal, setae brownish black, seta in middle on sclerotized dot, 2 others on 

 a sclerotized bar, lateral seta shorter and thinner than the others, short 

 median seta hairlike, ventral seta shorter but thicker. Sclerite "c" 

 with dark stripe at the base; seta small, light. 



Claw with 2 large dorsal denticles at the curvature and 3 smaller 

 denticles above them; seta 1 situated at the base, short, thick; seta 2 

 situated on the outer side subdorsally near membranous bar; seta 3 

 situated in distal part of dorsal side, slightly shorter than the claw; ventral 

 setae 7 and 8 straight, yellowish, thick, extending to apex of claw; seta 5 

 situated near 8, shorter and thinner; seta 4 slightly larger, thin, situated 

 close to inner margin of ventral part of membranous bar. 



Case straight or slightly curved, tapering slightly posteriorly, smooth, 

 made of particles of plants arranged in 6—7 rings (Figure 94). 



Pupa. Length 19 mm. Antennae reaching abdominal segment 4; front 

 sclerite with small anterior process. Labrum oblong (Figure 95, A), distal 

 part of mandibles rudimentary (Figure 95, B). Mid- and hind tarsi with 

 dense natatorial setae, fore tarsi with sparse setae. Dorsal process of 

 abdominal segment 1 with slightly sclerotized apex. Gills present on 

 segments 2—7. Holding apparatus on segments 3—7, number of spinules: 

 111:11; 1V:12-14; V: 10-16+ 11-19; VI:11-16; VII:15-16. Anal appendages 

 with rounded median process (Figure 96). 



Case as in the larva, to 30 min long, smooth; anterior opening covered 

 with moss. 



Mode of life and habitats. Rapidly or slowly running small, 

 water bodies with peaty water, draining ditches, outflow of distrophic lakes; 

 full-grown larvae appear in late autumn and early spring. 



Distribution. Northern, northwestern, central, and western parts 

 of the European USSR. In addition. Northern and Central Europe. 



8. Genus Hagenella Martynov 



Full-grown larva. Frontoclypeus dark laterally, without median pattern. 

 Fore tibia, as in Semblis, not wider distally, with light distoventral seta. 



Mesonotum without median sclerites. 



Case almost uniformly wide, slightly curved, made of plant fragments 

 arranged in rings. 



Pupa. Length 16 — 18 mm. Frontal sclerite anteriorly with large grooved 

 process. Natatorial setae of tarsi reduced, absent on forelegs, sparse on 

 hind legs, less sparse on midlegs. Anal appendages slightly sclerotized. 



Case to 30— 40 mm long. 



Mode of life and habitats. Small, overgrown, swampy water 

 bodies. 



Distribution. European USSR,, except in the southern part, Siberia, 

 the Am.ur Region, Sakhalin. In addition. Northern and Central Europe, Japan. 



68 



