Wing sheaths blackish brown, reaching middle or end of segment 6; 

 mid-tarsi with dense, golden yellow, natatorial setae. 



Abdominal segment 1 with small dorsal tubercles laterally at posterior 

 margin, and covered with small spinules directed posteriorly; a small area 

 with spinules directed anteriorly in middle (Figure 709, A); plates of holding 

 apparatus presegmental on segments 3 — 4, small, with 2 dark hooks directed 

 posteriorly; postsegmental plates of segment 5 elliptical, yellow, with 3 

 dark hooks directed anteriorly. 



Gills on segments 1—3. 



Dorsal processes near base of anal rods with 5 setae, 2 of them longer 

 and thicker than others; a thin, short seta ventrally on each side. Anal 

 rods short (Figure 709, B), thick, with 2 short, tooth-shaped processes in 

 distal part; asymmetrical seta in basal third light, thin; lateral subapical 

 seta strong, dark, large; apex with a small, light, lateral seta and a light, 

 small spinule. 



Case made of sand grains (Figure 710), 7 — 10 mm long, both ends with a 

 membrane with a large, round hole; anterior end with elliptical, posterior 

 end with round adhesive disks. 



Mode of life and habitats. Phytophagous, in vegetation of stagnant 

 and slow water bodies. 



Distribution. The European USSR, Western Siberia (isolated 

 records). In addition, Europe, mainly Central and Northern parts. 



2. Athripsodes cinereus Curtis -'= 



Hagen, 1864:231.— Siltala, 1905:61—68, 87, 90, Figure 15.— Ulmer, 1909: 

 248, 308, Figure 451.— Lestage, 1921 :606, 609— 616, Figures 203m,p, 205 D.— 

 Lepneva, 1940:210— 211, Figure 158. 



Full-grown larva. Length 12— 14 mm. Main color of head and thoracic 

 sclerites brownish yellow. Anterior part of frontoclypeus with 3 pairs of 

 dots, middle pair widely separated; posterior part with a group of 5 

 brownish dots (Figure 711, A). Dorsal stripes lateral to frontoclypeus 

 replaced by 3 large dots on each side; rows of dots instead of lateral stripes. 

 Gula and adjacent parts of large, lateral sclerites blackish brown, large 

 lateral dots posteriorly (Figure 711, B). 



Labrum with deep median indentation and a reddish brown median dot at 

 anterior margin. Teeth of mandibles distinct; left mandible with 2 sharp 

 teeth on dorsal blade in addition to distal tooth; dorsal blade of right 

 443 mandible with one sharp and one blunt basal tooth; each mandible with one 

 tooth on ventral blade. Spinulose, heart-shaped part of submentum slightly 

 longer than in A . at e r r i m u s ; setae similar. 



Pronotum with a lateral group of large dots posteriorly; a similar dot 

 anteriorly near median suture; setae restricted to anterior part (Figure 

 712, A); medioanal seta and seta lateral to the dot larger than the others. 

 Mesonotum (Figure 712, B) with deeply concave posterior and lateral margin; 

 streaks in posterior angle sharp, large, dark reddish brown; an indistinct 

 dot on each side posteriorly at median suture. Setae light, reddish brown, 

 scattered on most of surface; 11 — 12 anterior-angle setae outside the 

 sclerite, large, reddish brown. 



* Appears in the Soviet literature as Le ptoc erus cinereus. 



554 



