small on segment 5, large on segments 6—7. Number of spinules: 

 V:6-9+9-21; VI:6-13(l7); VII:5-14. Gills as in the larva. Anal 

 appendages (Figure 32) broadly triangular, with 4 short, dark setae; 

 ventral appendages of male pupae with slightly curved sheaths; penis 

 sheath bifid, shorter than the appendages. 



Case as in the larva, but slightly shorter. 



Mode of life and habitats. Stagnant water, often brackish; Aral 

 Sea, coast of the Gulf of Finland. 



Distribution. USSR: European part, the northern and northwestern 

 areas, southeastern Urals, Transcaucasia, Middle Asia (Aral, Kurgal'dzhino). 

 In addition, Mongolia. 



3. Genus Phryganea Linne 



Full-grown larva. Length 30— 40 mm. Pattern of frontoclypeus in form 

 of a narrow, dark, uniformly wide stripe, dorsal and lateral stripes dark, 

 distinct; ventral pattern absent, but dots sometimes present. 



Pronotum with wide, dark stripe near anterior margin; anterior -margin 

 setae include 3 long setae, both lateral setae also long. Fore- and mid- 

 femora with distinct, black, dorsal stripes. Fore tibia wider apically, 

 posterior distoventral seta in form of a short, thick, blunt spine; anterior 

 distoventral seta small. 



Case straight, of spirally arranged plant fragments. 



Pupa. Length to 20— 33 mm. Mandibles bent almost at a right angle. 

 Anal appendages short, broadly triangular. 



Mode of life and habitats. In vegetation of stagnant and slowly 

 running water, sometimes among detritus on the bottom on the open coast. 



Distribution. USSR: European part, Siberia. In addition, Europe, 

 China, Mongolia, Korea, Japan, North America. 



32 



Key to Species 

 Full-grown larva 



1 (2). Head light ventrally, without dots. Pronotum mainly light, with 



dark transverse stripe in anterior third; dots pale or absent in 

 posterior part 1. Ph. bipunctata Retz. (p. 35) 



2 (l). Head ventrally with group of dots, which are not always distinct. 



Pronotum with dark dots posteriorly 2. Ph. grandis L. (p. 42) 



Pupa 



1 (2). Process of frontal sclerite not markedly projecting, slightly 



tuberculate 1. Ph. bipunctata Retz. (p. 35) 



2 (l). Process of frontal sclerite large, markedly projecting, with brown, 



tuberculate, transverse grooves 2. Ph. grandis L. (p. 42) 



34 



