389 



Maxillary palps long, 5 -segmented; last segment curved and much longer 

 than the others; labial palps 3 -segmented; last segment longer than the two 

 preceding segments together (Figure 534). The blunt wing sheaths reach 

 the 4th abdominal segment; hind legs reaching end of body; midlegs reaching 

 segments 5 or 6; claws small, light, brownish at the end; natatorial setae 

 short, light, situated dor sally and ventrally on the first 4 segments of mid- 

 tarsi, small and sparse on the 4th segment. Presegmental plates present 

 on segments 3—8, small and brown (Figure 535), postsegmental plates on 

 segment 5; number of denticles as follows: 111:4-5; IV:6-7; V:7-10+ 10—12; 

 VI: 9— 10; VII:9— 10; VIII: 7— 8; presegmental plates of segment 8 connected 

 by posteriorly-curved sclerotized fold covered with spinules; a similar, 

 but lower fold in the posterior part of the dorsum of segments 7 and 8. 

 End of body narrow, with two long anal rods with black setae posteriorly; 

 these rods are thick, white and bent ventrally in young pupae. 



Pupae lying in elliptical case, which is built solidly of small stones and 

 sand grains; case with numerous ventilation holes (Figure 536); inner wall 

 of case smooth and thick. The pupa lies in a thin, loose cocoon made of 

 sparse grayish threads. 



Mode of life and habitats. Streams, in foothills, large brooks 

 and rivulets, on pebble bottom; living in tubular tunnels; microphagous. 



Distribution. USSR: Altai, Sayans, Maritime Territory, Sakhalin. 

 In addition, Japan, Korea, Mongolia, China, northern India. 



2. Stenopsyche bergeri Martynov 



Lepneva and Levanidova, 1953:326—33 6, Figures 1—8. 



Full-grown larva. Length 38— 40 mm; form of body (Figure 537) as in 

 S. griseipennis; sclerites lighter; ground color yellow or light yellow; 

 punctate pattern more distinct, as the dark background is absent. 



FIGURE 537. Stenopsyche bergeri Mart. Full-grown larva, lateral (after 

 Lepneva and Levanidova) 



Head (Figure 538) relatively longer than in S. griseipennis, light 

 yellow; eyes situated on a white area. Frontoclypeus slightly dark in 

 anterior half, brownish yellow, like the large sclerites lateral to it; 



435 



