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medioanal setae, lateral seta short; the relationships are sometimes 

 reversed; seta between medioanal setae dark, long, displaced to the left; 

 2—3 small setae on surface. 



Sclerite "b" of anal legs chestnut brown, with coarse, basal punctation; 

 mediodistal seta blackish brown; long, 2nd distal seta also large, lateral 

 seta thin, situated closer to 2nd distal seta, much smaller; ventral seta 

 short, thin; 2 setae at median margin, one of them resembling lateral 

 seta, the other situated more basally, short, thin; surface with 9—10 small 

 and short setae. Sclerite "c" reddish brown, with broad, blackish brown 

 lateral margin; seta small, brownish. 



Claw reddish brown, blackish brown distally, with a large dorsal denticle; 

 setae 2 and 3 reddish brown, of same length; seta 6 light brown, thinner 

 and smaller than short, thick seta 1; setae 7 and 8 light, seta 8 curved to 

 apex of claw; seta 5 small, light, situated near 8; seta 4 situated medially, 

 slightly larger. 



Case straight, smooth, 15—2 5 mm long, made of small plant particles, 

 often fragments of sedge or leaves of Glyceria,the fragments arranged 

 longitudinally; posterior end of case, open or closed by a membrane with 

 large, round hole; dorsal and ventral sides sometimes with narrow plant 

 fragments which are longer than the case, and project at ends; sand grains 

 or fragments of shells are rarely used (Figure 358). 



Pupa. Length 14—21 mm. Distal part of mandibles narrower than in 

 L. rhomb icus; blade almost straight, serrated. Midlegs natatorial; 

 hind tarsi with sparse setae on segments 1 or 1—4. 



Gills as in larva, on abdominal segments 2—7. Hooks of plates of holding 

 apparatus: 111:0-1; IV:2-3; V:2-4 + 11-17; VI:2-4; VII: 1-3. 



Anal rods straight, thin; seta 1 situated basally, seta 2 slightly basal to 

 the middle; setae 3 and 4 longer, situated subapically and apically. 

 Appendages of male genitalia wide, rounded posteriorly; penis sheath 

 (Figure 364) deeply divided, slightly shorter. 



Pupal case attached at anterior end; anterior and posterior opening 

 closed by sievelike membranes and covered by plants. 



Mode of life and habitats. Clear, moderately sunlit ponds, 

 near shore, on solid bottom; in calm parts of littoral of lakes; in slow, 

 clear brooks; prefers water bodies which are moderately sunlit in summer. 



Distribution. The European USSR, including the Crimea and 

 Caucasus, in the north to Novaya Zemlya and littoral of bays of the White 

 Sea. In addition, Europe, Iran. 



12. Limnophilus fuscicornis Rambur 



Struck, 1899:264, Figure 12; 1900 : Figure 1 9; 1903 : 74, 77-99, Plate I, 

 Figure 11, Plate VI, Figure 12. - Ulmer, 1903:56.- Siltala, 1904c: 59-60. 

 Ulmer. 1909:260-261.- Lestage, 1921 :735, 747. 



Full-grown larva. Length 18— 19 mm. Main color of head brownish 

 yellow. Pattern on frontoclypeus chestnut brown, occupying almost the 

 whole anterior part; wedge-shaped pattern at posterior margin with 

 large dots. Dorsal stripes reddish brown, short, indistinct, not reaching 



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