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near the base of the lower blade of the mandibles are several minute 

 pointed spinules which are more distinct on the right mandible. Outer 

 setae of mandibles situated close together; distodorsal seta light and 

 curved, longer than the straight dark basoventral seta. 



Pregula trapezoidal, with straight, anterior margin (Figure 329); cardo 

 dark brown, blackish in the middle, light anteriorly, with a short dark seta; 

 maxillolabium and submentum yellowish brown, transversely oblong, with 

 rounded posterior angles; unlike in R hy a c o ph i 1 a, the seta is situated 

 in the posterior angle; it is thin, light, long, very thin at the end; stipes 

 relatively broad; basal seta situated on a sclerite; distal seta shorter and 

 situated on a membrane; both setae light. Palpiger with a transparent, 

 light distal seta and a small basal seta; maxillary palps (unlike in 

 Rhyacophila) with short broad segments which differ little in length; 

 2nd segment slightly shorter than first; galea shorter and not as narrow 

 as in Rhyacophila. Mentum curved like a cup, large, without median 

 suture; ventral sclerites small, with a light seta; labial palpiger horseshoe- 

 shaped; labial palp thick and well developed as in Rhyacophila. 



Pronotum (Figure 324) yellowish brown, darker in some places; anterior 

 margin projecting, with a narrow reddish brown border; instead of the light 

 colored notch characteristic for Rhyacophila, a small tubercle with a 

 short, strong dark primary anterior -angle seta near the anterior angle; 

 lateral margin curved inward in the anterior quarter, with a narrow brownish 

 border; other part of lateral margin with a broad dark brown border which 

 becomes broader posteriorly; posterior angles distinct but not long; suture 

 with a dark posterolateral border in the middle which projects in form of 

 pointed angles at the sides of the suture; posterior margin blackish brown, 

 uniformly broad. Sclerite with two narrow longitudinal ridges near the 

 suture; tubercle in form of an Ancylus shell with the apex directed 

 anteriorly at the sides of each half of the sclerite; this tubercle bears 

 several light spots without chetoids. Lateral to the primary anterior- 

 angle seta 1 is a secondary seta, to its inside stands seta 2; small light 

 inward-directed setae at the anterior margin of the sclerite; one of them 

 situated near the median suture, straight, light and longer; 3 straight, short 

 and thin setae situated slightly away from the margin; a short, light thick 

 seta situated in a depression between the median and the hook- shaped 

 tubercles; second seta similar and situated on the apex of the hook- shaped 

 tubercle; third seta situated laterally near the base of the tubercle; 2 short 

 dark setae laterally;and several small setae in the anterior-angle region. 



Unlike in Rhy a c o ph i 1 a, meso- and metathorax (Figure 324) are not 

 broader posteriorly; anterior margin of mesonotum projecting anteriorly 

 as a thick membranous fold; dorsum of segments divided by a transverse 

 groove into an anterior and a posterior part; each part with two hillock - 

 shaped tubercles at the sides; middle of the posterior part with light dots. 

 Dorsal setae small, dark at the base, situated on small yellow sclerotized 

 dots; anterior- margin setae of mesonotum slightly larger than those of 

 metanotum; anterior -angle setae situated near apex of anterior lateral 

 process; surface setae form an oblique row near the base of the tubercle; 

 all 3 groups of setae of about the same size. 



Pleuron of the prothorax (Figure 330, A) with a broad black longitudinal 

 pleural groove; episternal region reddish brown, with indistinct yellow 

 spots; epimeral part of sclerite darker and smaller; epimeral seta situated 



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