Mode of life and habitats. Streams in foothills, on pebble bottom; 

 under stones. 



Distribution. USSR: Altai, Sayans, Eastern Siberia (southern part), 

 Sakhalin, Maritime Territory. In addition, eastern and southern Asia, 

 Africa (rare). 



1. Genus Stenopsyche McLachlan 



Martynov (1926c) revised the classification of the family and included 

 3 genera: Stenopsyche McLachlan, Stenopsychodes Ulmer and 

 Pseudostenopsyche Dohler. Only the first genus occurs in the USSR. 

 Martynov (1926c) placed the species S. bergeri described in 1926 in genus 

 Stenopsyche. Later, when Kuwayama described the new genus 

 Par a s t e nop sy c he in 1930, Martynov (1934) placed b e r g e r i in the 

 genus Parastenopsyche Kuw.j he stated that the two genera were very 

 similar and differ only in the number of spurs on the forelegs of males and 

 females and in the length of abdominal segment 10. Mosley wrote to 

 Martynov (9 September 1935) that separation of a genus on the basis of the 

 formula of the spurs is not justified in his opinion, and the genus Parasteno- 

 psyche should be sunk and its species transferred to Stenopsyche. 



"I am not accepting any new genera, based on the variation of the spur 

 formula, and as a consequence sink Kuwayama' s genus Parastenopsyche 

 when I come to it, transferring all the species to Stenopsyche." 



The larvae of the St. gr i s e ipe nn i s and St. bergeri differ only 

 in minor characters, mainly in color and this confirms the original view of 

 Martynov (1926c) on the systematic position of St. bergeri; we accept 

 this view here. 



Key to Species of Stenopsyche 

 Full-grown larva 



1 (2). Dots on head and thorax situated on dark stripes; frontoclypeus with 



a broad dark longitudinal stripe; basodorsal process of coxa of 

 forelegs conical, large, pointed .... 1. St. griseipennis McL. (p. 424) 



2 (l). Dark stripes absent or indistinct; dark longitudinal stripe on fronto- 



clypeus absent; basodorsal process of fore coxa much smaller, 



with rounded apex 2. St. bergeri Mart. (p. 435) 



1. Stenopsyche griseipennis McLachlan 



Martynov, 1926c:291-298, Figures 9-14.- Iwata, 1927a:208, Plate I, 

 Figure 3, Plate III, Figures 61-68.*— Kuwayama, 1930:113, Figure 2. - 

 Lepneva, 1940:203; 1948a:229-235, Figures 1-8. 



Full-grown larva (Figure 523). Length 45—50 mm. Color of sclerotized 

 parts reddish brown, with a distinct punctate pattern; rows and groups of 

 dots and isolated dots present on a dark background. Length of head 



* Described as Philopotamopsis japonica n.sp. 



424 



