Number and arrangement of gills ofA.amurensis 



Segment 



Dorsal 



Pleural 



Ventral 



2 



2-3 

 3 



1 



2 



2 

 3 



3 



3 

 3 



2 



2 



3 

 3 



4 



3 

 2 



2 



2-1 



3 

 3 



5 



2 

 2 



1 



1 



2 



6 



2 



2 







1 



2 

 2 



7 



2 







2 

 2 



8 



1(0) 







2-1 



Mode of life and habitats. Brooks and rivulets with clean water^ 

 in parts with a slow current; puddles and lakes in river floodplains. 



Distribution. USSR: Amur 

 Region, Eastern and Western Siberia. 



2. Asynarchus lapponicus Zetterstedt 

 (Anabolia modesta Hagen; 

 Asynarchus f u s o r i u s McLachlan; 

 Limnephilus modestus Ross)* 



Lepneva, 1949:172-173, Fig- 

 ures 23 — 25. 



Full-grown larva. Length 15 mm. 

 Main color yellow. Frontoclypeus 

 (Figure 437) slightly dark in part of 

 or whole anterior part; posterior part 

 with a short, narrow, dark stripe 

 near sutures; a broad, dark area near 

 tentorial pits; anterior region with 

 ^36 3 — 4 dots on darker background 



lateral to median pit, 3 dots further 

 Asynarchus posteriorly; wedge-shaped pattern in 



posterior part with large dots, darker 

 43g _ in middle, with yellowish white lateral 



areas. A narrow, dark stripe on site 

 of dorsal stripes along frrintal sutures 

 and epicranial suture, beginning from 

 eye; transverse rows and groups of dots on dorsal stripes, also sometimes 

 situated on dark background. Lateral stripes represented by longitudinal 



* Synonymy, see Schmid, 1954: 78; 1955: 154. 



FIGURES 435 and 436. 

 amurensis Ulm.; 



435 — claw of left anal leg, lateral 

 larval case. 



311 



