Larval case made of secretion, anterior dorsal end projecting so that 

 wide anterior opening is directed downward; posterior opening round, 

 directed upward (Figure 739). 



Pupa. Labrum with rugose anterior margin and a slight median 

 projection; 2 of the 6 setae situated posteriorly and larger than remaining 

 small to moderately long setae; the median of the 3 small setae of 

 anteclypeus larger than others. Mandibles (Figure 740, A) with dentate 

 median margin in distal part, 5 teeth larger than others. Gills on segments 

 2—7. Anal rod as in Figure 740, B. 



Case as in larva, attached at both ends. 



Mode of life and habitats. Running water, usually among 

 sponges. 



Distribution. Northern and western parts of the European USSR. 

 In addition, Europe. 



8. Athripsodes senilis Burmeister 



Klapalek, 1888:37—39, Figure 13.— Ulmer, 1903:100.— Thienemann, 

 1905b:534, 536, 552, Figures 14—16, 76—77, 104.— Siltala, 1905:53—57, 

 Figure 12; 1907:463—465, 469—471.— Ulmer, 1909:247, 307, Figure 448b.- 

 Lestage, 1921:601—617, Figures 203, 205—207.— Lepneva, 1940:210. 



Full-grown larva. Length 8.5— 10.0 mm, Head (Figure 741, A) white, 

 pale yellowish in some places, without pattern; antennae smaller than in 

 other species. Frontoclypeus with brownish anterior margin; adfrontal 

 stripes indistinct, on light background. Gula wide, pinkish brown, broadly 

 barrel- shaped, with slightly concave anterior margin. Setae light brown 

 or yellowish (Figure 741, B); seta 17 short, directed inward. 



FIGURE 741. Athripsodes senilis Burm. Head, dorsal (A) and ventral (E 



Labrum brownish, with distinct median depression; setae 3 and 5 

 situated near the margin, 3 larger than 5. Mandibles short, dark brown, with 

 a narrow, beaklike, apical toothy and a deep, median indentation; dorsal 

 blade projecting, with a small tooth near apical tooth; ventral blade with 2 

 blunt teeth; lateral setae light, of equal length. 



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