Wing sheaths of male pupae reaching end of segment 4, those of female 

 pupae end of segment 3. Claws of forelegs and midlegs slightly yellowish; 

 claws of hind legs transparent. 



Presegmental plates of holding apparatus on abdominal segments 3—7 

 very small; postsegmental plates on segment 5 slightly larger. Last body 

 segment of female pupae blunt; last segment of male pupae with ventral 

 appendages which are longer than the penis. 



Mode of life and habitats. Running cool water with rapid or 

 slow current. 



Distribution. Northwest, west and central belt of the European 

 USSR, Caucasus. In addition, Central and northern Europe. 



2. Genus Philopotamus Stephens 



Full-grown larva. Large, to 22 mm long. Head almost twice as long 

 as pronotum with almost parallel sides. Frontoclypeus with asymmetrically 

 incised anterior margin; right and left mandibles with teeth at the blades; 

 both outer setae straight, situated at a distance from the basal margin. 



Pronotum with broad black posterior margin, which extends, unlike in 

 Wormaldia, also on the lateral margin. Basal seta of claws of legs 

 situated on a tubercle, at the base of which is a short, blunt, basal spine on 

 midlegs and hind legs. Claws of holding apparatus short and strong. 



Pupa. Length of female pupae 12—13 mm, length of male pupae about 

 11 mm. Antennae thin, reaching end of segments 5—6. Labrum broad, 

 with 5 setae at the anterior margin; the 2 lateral of these setae longer than 

 the 3 median setae; mandibles long and strong as in Wormaldia, 

 374 geniculate at the base, with 3 serrated apical teeth and 2 short basal setae 

 of almost the same length. 



Plates of holding apparatus present on segments 3—7, little developed. 

 Ventral appendages of male longer than penis. 



Case made of small stones; pupae lying in a yellowish brown cocoon. 



Mode of life and habitats. Brooks and rivulets with cool 

 water, under stones; mainly in mountain regions. 



Distribution. West of the European USSR, Caucasus. In addition, 

 Europe. 



1. Philopotamus montanus Donovan 



Pictet, 1834:210, Plate XVIII, Figure 5. - McLachlan, 1865:139-140, 

 Plate 2, Figure 7.- Morton, 1888b:89-91. - Klapalek, 1893:112-115, 

 Figure 3, C. - Ulmer, 1903:117, Figures 10, 21,35, 71, 80; 1903c:347, 

 Figure 1; 1909:227, 294, Figure 352. - Siltala, 1905:119-121, Figure 28; 

 1907:398-401, Figure 4, a-b. - Lestage, 1921:473-476, Figure 153.- Hickin, 

 1942:16-17, Figures 1-5. 



Full-grown larva. Large, 20— 22 mm long. Head (Figure 51 1) oblong, 

 twice as long as pronotum, with almost parallel sides, shining, chestnut 

 brown, darker anteriorly; projecting anterior margin of frontoclypeus 



417 



