;n8) 



FIGURE 165. Pupae of Rhyacophila sp. and Mystrophora sp . on the lower 

 surface of a stone (Rhyacophila pupae are larger and those of Mystrophora 

 smaller) 



A similar distribution is shown by Trichoptera of streams and brooks 

 in the Western and Eastern Sayan Mountains and mountains in the middle 

 reaches of the Yenisei. Rhyacophila s ib i r i c a, My s t r o ph or a 

 altaica, Neophylax ussuriensis and O 1 i g op 1 e c t r o d e s 

 potanini are most common; the larvae of Apataniinae (Figure 166) occur 

 more frequently (Lepneva, 1948b:92-95; 1949:256-257). 



120 



FIGURE 166. Pupae of Limnophilidae on a stone in the Malyi Arzybei rivulet in the Mana River basin 

 (photograph by Dul'keit) 



109 



