(377) 



FIGURES 517-522. Chimarrha marginata L. (after Marlier): 



517 — full-grown larva, dorsal; 518 — labrum; 519 — mandibles, dorsal: 

 left mandible (A), right mandible (B); 520 — foreleg: coxa and base of 

 trochanter (A), apex of tarsus and claw (B); 521 — labrum of pupa; 522 

 left mandible of pupa, ventral. 



Holding apparatus well developed; presegmental plates present on 

 segments 3 — 8; postsegmental plates on segment 5; number of crotchets 

 as follows: 111:4-5; IV:4-5j V:5+9; VI:9; VII:4; VIII:3-5; crotchets of 

 different length; postsegmental plates of segment 5 with 3 large and 

 6 minute crotchets; presegmental plates on segment 6 with 6 large and 

 3 minute crotchets; segment 8 with 1 or 2 large and 2 small crotchets. 



Mode of life and habitats. Brooks with cool, clean water and 

 rapid current. 



Distribution. West of the European USSR (Sortavala, Latvia, 

 Lithuania). In addition, Europe. 



422 



