fromthatin Rhy acophila s.str.j seta 9 longer than the others; posterior 

 to it is the small, light seta 11; seta 7 is large, more than half as long as 

 seta 9; seta 10 is small, light, situated on the outer side, near the eye; 

 setae 12 and 14 are situated posterior to the eye; they are almost of the 

 same length; setae 15 and 16 are situated behind each other; they are 

 somewhat lighter and thinner; seta 15 is long, seta 16 is shorter; both setae 

 are slightly curved inward; seta 13 is thin, light and recumbent. 



Dorsal sclerite of labrum golden yellow; the membranous margin is 

 white, with short hairs; seta 1 is situated on the membrane; it is trans- 

 parent and strongly curved; seta 4 small, light; seta 3 short, light, curved 

 inward, but not recumbent; setae 2, 5 and 6 long, brownish and thin; seta 2 

 situated anteriorly, slightly shorter than the other two; seta 5 situated near 

 the anterior angle; seta 6 situated more medially and posteriorly; unlike 

 Rhy acophila s. str., it is longer than seta 5. Mandibles short and 

 massive as in Rhyacophila s. str.; upper blades without teeth 

 (Figure 236); lower blade of left mandible with a small tubercle near the 

 distal margin of the serrated part; lower blade of right mandible with a 

 blunt indistinct basal tooth; outer setae little different in length; the disto- 

 dorsal seta situated nearby is shorter and curved. 



Gula yellowish. Pregula markedly darker than gula and broader, dark 

 brown; cardo also dark brown; the seta is small and light; submentum 

 brown, crescent-shaped; the setae are small, light, situated near the anterior 

 angles of the sclerite. Sclerites of stipes narrow, light brown; the setae are 

 thin; basal seta much longer than apical seta; mentum golden brown, with a 

 narrow indistinct median suture; palpiger, labial palps and labium yellow, 

 resembling those of Rhyacophila s. str. 



Pronotum (Figure 23 7) brownish, with indistinct dots; posterior margin 

 narrowly black in the middle and laterally; reddish brown cross stripes in 

 each half of the processes; the posterior angles form broad blackish brown 

 processes; a similar broad dark stripe of the posterior third of the lateral 

 margin is directly contiguous to the processes; the other part of the 

 lateral margin and the anterior margin are without a border; anterior angle 

 with a small reddish spot near the margin of the depression. The black 

 lateral margin of the pronotum is separated from the brown surface of the 

 sclerite by a white membranous stripe which is yellow at the base; it 

 extends also anteriorly as a narrow frame of the light part of the lateral 

 margin; the lateral margin of the anterior part of the sclerite is continued 

 posteriorly in a narrow brown stripe in the posterior third, at the boundary 

 with the white stripe which separates the dark lateral border; thus, the 

 pronotum has a double border laterally to the posterior part. Two long 

 reddish brown setae in anterior angle notch of the sclerite, one primary and 

 one secondary; the 2nd secondary seta is short, yellowish, situated on a 

 sclerite near the outer margin of the depression; 3 moderately long thin 

 brownish setae are situated at an equal distance from each other at the 

 anterior margin; between them are 3 or 4 small, thin setae at the margin; 

 a similar light but longer thin seta is situated at the corner of the sclerite; 

 a relatively long seta near the median suture and a shorter seta some 

 distance from the first, as in Rhyacophila s. str., in about the middle; 

 a small light seta laterally, near the base of each seta; a short reddish 

 brown seta near the lateral margin of the brown sclerite, on the whitish, 

 membranous margin, near the distal margin of the dark stripe on the 

 posterior third of the sclerite. 



5724 252 



