Mode of life and habitats. Small biotopes in lakes, ponds, and 

 swampy water bodies the bottom of which is covered with fallen leaves. 

 Distribution. Northwestern and western parts of the European 

 USSR. In addition, Europe, except Northern and Southern parts. 



Number and arrangement of gills of G . p e 1 1 u c i d u s 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 



3 





3 





3 





2 



3 





3 



2 





3 



3 













3 





2 



3 





2 



2 





3 



4 













2 





1 



3 





2 



1 





3 



5 













2 





1 



3 





2 







2 



6 



2 







2 





2 







2 



7 



2 







2 





2 









8 











3. Genus Grammotaulius Kolenati 



Full-grown larva. Length to 35 mm. Head light, with distinct punctate 

 pattern; dorsal stripes barely visible, usually absent. Mesonotum shorter 

 and narrower than pronotum. Claw of anal legs with 2 dorsal denticles. 

 Case made of large, long, plant particles arranged in a more or less 

 distinct spiral. 



Mode of life and habitats. Small, stagnant, overgrown water 

 bodies with abundant detritus. 



Distribution. The European USSR, Western and Eastern Siberia, 

 Far East, Kamchatka. In addition, Europe, Iran, Japan, North America. 



Key to Species 

 Full-grown larva 



1 (2). Head light brownish; median stripe on frontoclypeus and dorsal 



stripes more or less distinct; case long, narrow, length of visible 



ends of second and following turns of spiral covering about one 



half of first turn 1. G. atomarius Fabr. (p. 195) 



2 (l). Coloration of head similar or different; case shorter and wider, or 



with different spiral covering. 



3 (6 ). Spiral of case cover, as in G. atomarius, consisting of long plant 



fragments, which are sometimes narrow; first turn of spiral always 

 much larger than following turns. 



194 



