Labrum (Figure 2 67) with a narrow membranous stripe anteriorly and 

 laterally; hairs at the sides of the labrum white; dorsal sclerite buff 

 yellow, with slightly concave anterior margin; seta 1 situated on a membrane 

 small, curved and light; seta 2 situated near the margin of the sclerite and 

 slightly larger; the thin seta 4 is situated medially on a sclerite; seta 3 

 situated laterally and recumbent; seta 5 situated at the anterior angle of 

 the sclerite, large and brownish; seta 6 shorter, situated on the surface, 

 medial to seta 3. 



Mandibles (Figure 268) chestnut brown, darker apically. Upper blade of 

 left mandible with one tooth; lower blade of the left mandible with a pro- 

 jecting, finely serrate part with small lateral processes; upper blade of 

 right mandible with a small subapical tooth; lower blade of right mandible 

 with a large basal tooth. Outer setae of mandibles of almost the same 

 length. 



Pregula (Figure 269) with straight anterior margin; the sides are 

 oblique; submentum broadly quadrangular, with rounded anterior corners; 

 posterior margin of submentum contiguous with anterior margin of pregula; 

 setae small near the lateral margin and situated in the middle of the 

 sclerite. Sclerites of cardo relatively large, their median margin adjacent 

 to the submentum; part of the posterior margin of the sclerites of the cardo 

 contiguous with the oblique sides of the pregula; the seta is short; unlike in 

 Rhy a cophila s. str., it is larger and not smaller than the seta on the 

 submentum. Mentum large; it has no median suture according to 



256 Botosaneanu (1952:898); its anterior margin has a small asymmetrical 

 process; the small ventral sclerites are rhomboidal, with a small light seta. 



Pronotum (Figure 270) brownish; angles of the anterior margin with a 

 deep rounded notch; lateral margin of the anterior part with a narrow 

 brown border; posterior third of lateral margin with a broad, black border; 

 posterior angles black; border of posterior margin black in the middle and 

 laterally; brown in the middle of each half, with broad, rounded, posterior 

 processes. There are light short setae at the anterior margin; 3 setae in 

 the anterior -angle depression, a primary and 2 secondary setae; process 

 of anterior angle with 3 small thin setae and one stronger seta; transverse 

 row of 4 setae about midlength of the sclerite; 2 of these setae are long 

 and strong and 2 are short and thin; a short thick seta near the lateral 

 margin of the posterior third, near the end of the broad black border; 

 a larger seta anterior to the latter, at a distance from the margin; the 



257 sclerite bears in addition several small thin setae which are mainly 

 situated near the anterior angle. 



Propleuron (Figure 270) with a broad, black longitudinal stripe in the 

 middle; this stripe is dark brown in the epimeral and episternal region; 

 dorsal sclerite of episternum yellow and separated from the basal sclerite 

 by a narrow membranous stripe; it is not fused with this at the base, as 

 in species of Rhyacophila s. str., according to Botosaneanu (1952, 

 Figure 4, A). Trochantin with a long, narrow hornlike process and a short, 

 strong, apical seta; both setae are small and situated on the outer side of 

 the membrane, one behind the other; seta of epimeron small and situated 

 on a membrane. 



Forelegs more massive but shorter than the midlegs and hind legs. 



Abdominal segments (Figure 271) dorsoventrally compressed; they are 

 reddish, with a pattern of light stripes and spots in alcohol specimens; 



273 



