tergites of metanotum small, lateral tergite dark, large, oblong. Prothoracic 

 horn small, brownish. Dorsal and lateral processes of abdominal segment 1 

 with slightly sclerotized apex. Gills single. Case made of sand grains, 

 with small stones laterally, narrower posteriorly, flattened ventrally. 



Pupa. Length 10— 14 mm. Antennae longer than body, curved at end. 

 Labrum with broadly rounded, slightly projecting median process. Mandibles 

 with wide, straight, apical part and slightly serrated in middle. Anal rods 

 thin, not wider basally. 



Mode of life and habitats. Rheobiont, phytophagous; mountain 

 brooks and rivulets; on stones overgrown with algae. 



Distribution. USSR: Altai, Sayans, Maritime Territory and Amur 

 Region, Sakhalin. In addition. Central Himalayas, China, Tibet, Japan, 

 North America, eastern Australia. 



1. Genus Neophylax McLachlan (Hal e s inu s Ulmer) 

 Full-grown larva* 



Mode of life and habitats. Rheophilic, in brooks and rivulets, 

 mainly in mountains. 



Distribution. USSR: Altai, Sayans, Maritime Territory and Amur 

 Region, Sakhalin. In addition, China, Himalayas, Japan, North America. 



1. Neophylax ussuriensis Martynov 



Lepneva, 1949:182-184, Figures 41-51. 



Full-grown larva. Length 12 — 14mm. Sclerites and most membranous 

 areas with tuberculate surface. Head (Figure 133) oblong. Eyes situated 

 at about mid -length of head. Antennae situated in middle between eye and 

 anterior margin, with dark sensilla. Frontoclypeus wide and large 

 anteriorly, with small median indentation, posterior part narrow, much 

 smaller. Head mainly chestnut brown, darker near anterior margin, with 

 light brown lateral stripes from the fork to the curvature of the frontal 

 sutures, with light brown areas along the gula and in each half ventrally. 

 Gula narrow, pointed posteriorly. Dots large, light; anterior part of 

 frontoclypeus with 2 dots on each side and one dot further posteriorly, 

 large light dots in a characteristic wedge-shaped pattern on posterior part; 

 similar dots on the dorsal and lateral stripes; dots indistinct on sides 

 of ventral surface. Large setae black; anterior -margin setae, especially 

 the long median seta, dark; lateral seta transparent, short, curved inward; 

 anterior frontal seta the same, light, procumbent, slightly longer; middle 

 frontal seta small, light, near the tentorial pit; several small light setae 

 on each side, in the posterior part, including the posterior primary seta, 

 situated in the middle of that part. Seta 7 dark brown, situated between 

 antenna and anterior margin; seta 9 long, thick, larger than the others; 

 seta 11 some distance posteriorly, small, light brown; seta 10 on light 



* A diagnosis cannot be given, as the larvae of the 2 other genera of the subfamily are not known. 



96 



