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Dorsal sclerite of labrum 

 brownish; setae as in Figure 395, C. 

 Mandibles blackish brown 

 (Figure 395, D, E). 



Pronotum. brown; groove in 

 anterior third not dark in middle; 

 X -shaped median pattern formed 

 by distinct dots. Lateral dots small, 

 not always distinct; posterior 

 margin with wide, black stripe; 

 setae as in Figure 396. Mesonotum 

 dark brown anteriorly in middle; 

 posterior angle with oblique black 

 stripe; dots as in Figure 396; 

 posterior margin black, wider 

 at posterior angle. Legs as in 

 Figure 397. A, B, C. 



Gills on segments 2—7. 

 Claw of anal legs with a dorsal 

 denticle (Figure 397, D). 



Case 16— 19 mm long, smooth, 

 slightly curved, made of small, 

 transversely arranged, regular 

 particles of plants and detritus. 



Pupa. Length 12 — 14 mm. 

 Antennae reaching beginning of 

 segment 9. Mandibles with 

 straight or slightly curved median 

 blade. Mid -tarsi with natatorial 

 setae; sparse setae on segments 

 1—4 of hind tarsi, sometimes 

 only on segment 1. 



Holding apparatus on abdominal 

 segments 3—7; number of hooks 

 variable: 111:1-6; IV: 2-6; V:3-6+ 

 8-19; VI: 3-6; VII: 3-7. Sheath 

 of genitalia rounded posteriorly; 

 penis sheath bifid, slightly longer than lateral appendages. Anal rods 

 slightly curved at end; seta situated in basal quarter, 2nd in middle, 3rd 

 and 4th setae apically and subapically. 



Pupal case 14 — 16 mm long; ends rounded, covered with small plant 

 fragments as is other surface, small sand grains sometimes present at 

 ends instead of plant particles; whole case rarely made of sand grains. 



Mode of life and habitats. Spring species, in ditches, sometimes 

 in slow current, in swampy areas. 



Distribution. Northern, western, and central parts of the European 

 USSR, Middle Asia, North [of USSR], Sayans. In addition, Europe. 



FIGURE 397. Limnophilus sparsusCurt. 

 Right foreleg (A),midleg (B),and hind leg(C), 

 posterior; left anal leg, lateral (D) (after 

 Zarechnaya) 



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