uniformly rounded reddish process in the middle of each half; lateral 

 margin dark, with a large black spot in the posterior third. Posterior part 

 of sclerite with a characteristic T-shaped figure consisting of a row of dots 

 at the median suture and of several dots anteriorly, lateral to the row; each 

 half of the sclerite with large groups of dots. 

 281 Primary anterior-angle seta situated in a light depression, thick, dark 

 brown and large; the 2 secondary setae on the sides are short and light; 

 the black anterior -angle process with 3 thin light setae and several very 

 small setae; small, light setae curved toward the middle at the anterior 

 margin; 3 or 4 short dark brown setae in the middle of the sclerite 

 posterior to these setae, lateral to the suture. Between the medial punctate 

 figure and the lateral groups of dots stands a thick, brown primary medio- 

 anal seta; there is one seta nearby and lateral to it; a row of 8 or 9 shorter 

 and thin, dark, secondary setae posteriorly which is characteristic for 

 Himalopsyche. The middle of each half of the sclerite has several 

 short, small setae in the punctate region; some of them are dark and thick; 

 2 short, strong, chestnut brownish setae situated one behind the other near 

 the lateral margin. 



Metathorax slightly larger than mesothorax (Figure 310); in the pleural 

 region, the gills anterior to the base of the legs consist of a conical, long 

 stalk with numerous filaments on the dorsal side and with several filaments 

 on the dorsum of the thorax near the base of the stalk. The setae of meso- 

 and metathorax are strongly reduced in size, thin and reddish brown; there 

 is similarity between the small anterior -margin seta of both segments; 

 the primary anterior -angle seta and the very small secondary seta near it 

 are both situated among the gill filaments, near the base of the stalk; 

 medioanal and intermediate setae of the same length; lateral seta slightly 

 smaller. 



The propleuron (Figure 3 1 6, A) consists of a thick blackish brown sclerite 

 in the greater part of the episternal-epimeral region; episternum yellowish, 

 indistinct; seta of epimeron small; distal process of trochantin shorter 

 than in Rhyacophila s. str.; trochantin brown, with a broad dark stripe 

 at the base; seta on the membranous apex reddish brown, strong, situated 

 near the margin of the sclerite on a small sclerotized dot; both setules 

 situated on a membrane, one behind the other, and light. 



The pleurites of the meso- and metathorax form narrow sclerites, the 

 transverse sclerite larger and yellowish brown in its basal part, with large 

 dots; distal part directed toward the leg with a broad black stripe; seta on 

 epimeron situated on a membrane, small and dark; longitudinal sclerite 

 mainly reddish brown; seta small; both setules of the trochantin (which is 

 fused with the episternum) situated anteriorly near the margin of the 

 sclerite and light (Figure 316, B). 



Legs (Figures 317 and 318) short; midlegs and hind legs slightly longer 

 and thinner than forelegs; femur of forelegs more massive than that of 

 midlegs and hind legs; coxa shorter. Legs yellowish brown, with dark 

 pattern and a dorsal longitudinal crest of whitish hairs on femora, tibiae 

 and tarsi. Sclerites and some membranous parts of the legs with 

 numerous minute chetoids; ventral membranous area between coxa and 

 trochanter inflated, with numerous minute spinules. Most setae short, 

 some of them reduced in size. 



303 



