Wing sheaths of the male reaching the 4th abdominal segment, those of 

 the female the 5th abdominal segment. The natatorial setae on 

 segments 1—4 of the midtarsi are dense, light, longer in the dorsal row than 

 in the ventral row (Figure 356). The spinose presegmental plates of the 

 holding apparatus are present on segments 3—7, postsegmental plates on 

 segments 4—5; segment 8 is small, much smaller than 7; segment 9 narrow, 

 curved ventrally; segment 8 with wart- shaped tubercles near the posterior 

 angles; they are also covered with spinules. Ninth segment of male pupae 

 with a ventral process which contains the long ventral appendages of the 

 male. End of abdomen of male pupa with 3 blackish short setae laterally; 

 the end of the abdomen of the female pupa and of the male narrow, curved 

 ventrally, with 3 long dark strong setae posteriorly. Cocoon opaque, thick, 

 dark brown. 



The pupal case resembles the case of the oldest larval stage; however, 

 as in all species of Glossosomatidae, it has no ventral wall; the case is 

 attached to the substrate by strands of strong threads (Figure 357). 



Mode of life and habitats. Brooks and rivulets with cool water 

 and stony bottom. 



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



2. Mystrophora intermedia Klapalek 

 Kimmins, 1943:96— 98, Figures 1-12. 



(306] 



FIGURES 358-364. Mystrophora intermedia Klap. (after Kimmins): 



358 — frontoclypeus; 359 — end of tarsus and claw of hind leg; 360 — claw of anal 

 leg (only part of the setae are shown); 361 — pupa of male, lateral; 362 — labrum 

 of pupa; 363 — right mandible of pupa, ventral; 364 — end of body of female pupa. 



332 



