right mandible, anterior and posterior to the setae; they are absent on the 

 left mandible. Punctate pattern on legs indistinct; dark stripe on the tibiae 

 and tarsi absent. 



FIGURES 322 and 323. Himalopsyche sp. "larva hoplura" Lepn. 

 322 - mandibles, dorsal; 323 - outer view of right anal leg. 



Anal legs (Figure 323) of both species of Himalopsyche similar in 

 the area of sclerite "b, " There are marked differences in the structure 

 of section "c"; ventral sclerite "c" light brown as in H. g igant e a, with 

 a strong dark seta; outer lateral sclerite triangular, with a broad, dark 

 brown stripe posteriorly and a massive outward-directed process which is 

 divided like a fork and curved ventrally. Unlike H. gigantea, claw 

 ventrally with 3 thin small spinules; seta 2 dark brown, movable, flattened, 

 larger than in H. g i g a n t e a. 



Mode of life and habitats. High -mountain, cool-water streams. 



Distribution. USSR: mountains of Middle Asia. 



286 



3. Genus Philocrena Lepneva 



Full-grown larva. Medium sized; length about 18 mm; not dorsoventrally 

 flattened, slightly broader posteriorly. Primary setae are short except 

 setae of anal legs, some of them reduced in size. Head not completely 

 prognathous, slightly inclined downward; gular suture not longer than 

 coronal suture. Frontoclypeus with deep lateral notches; lateral anterior - 

 margin seta situated in the angles of the sclerite; unlike in Rhyacophila, 

 it is situated inside and not lateral to the frontal suture. Segments of 

 maxillary palps uniformly developed; 2nd segment shorter than first 

 segment. Pronotum without a light anterior -angle notch which is charac- 

 teristic for the species of Rhyacophila. Trochantin of meso- and meta- 

 thorax differentiated. All 3 pairs of legs very similar. Dorsum of 

 abdominal segments rugose; anal legs large; lateral sclerite "b" without 

 sword-shaped distal process and with a large basoventral hook; second hook 

 situated nearby on a small sclerite. Claw is unusually long, with strong 

 and long setae. 



308 



