transverse row of 4 large, lighter dots. Dorsal stripes on head brown, 

 dark, almost fused with lateral stripes which extend close to coronal suture; 

 only a narrow light stripe along suture; dots on stripes not always distinct; 

 light, round spots at base of setae 15 and 16. 



FIGURES 214-216. Rhyacophila dorsalis Curt: 



214 — head, dorsal; 215 — pronotum; 216 — claw of left anal leg, outer view (215 — modified 

 after Hickin; other drawings after Mackereth). 



Pronotum (Figure 215) yellowish in the anterior part; its posterior part 

 is almost completely covered by the transverse, dark brown figure with 

 groups of dots in the middle of each half, as in R h. nub i la. 



Claw of anal legs (Figure 216) with a large tubercle at the base of seta 8; 

 ventral spinules of the distal part of the claw also rather large, differing 

 little in size, 2, sometimes 3, in number. 



Mode of life and habitats. Rapidly running brooks, on stony 

 bottom. 



Distribution. Not recorded from the USSR, but possibly occurring 

 in the southwest and west; Europe. 



7. Rhyacophila vulgaris Pictet 



Pictet, 1834:182-184, Plate XV, Figure 1.- Hagen, 1864:143. - Ulmer, 

 1902c:492, Figures 24-25; 1903:127; 1909:219, Figure 344.- Lestage, 

 1921:415-417. 



235 



