66^ 



■^.^> 



666 



665 A 



6S5 B 



FIGURES 664-666. Ganonema e x te n su m Mart.: 



664 — pronotum, dorsal (A) and propleuron (B); 665 — tergite of abdominal segment 

 (A), claw of right anal leg, lateral (B); 666 — larval case. 



Case made of large, decayed, soft fragments of tree detritus, in which 

 larva bores a cylindrical tunnel (Figure 666); posterior end remains 

 closed. 



Mode of life and habitats. Calm creeks and channels of small 

 rivers with abundant detritus on bottom. 



Distribution. USSR: Maritime Territory. Not recorded outside the 

 USSR. 



40 8 VII. Family ODONTOCERIDAE Wallengren 



Full-grown larva. Length 16— 17mm. Head wide, only slightly longer 

 than wide; eyes situated some distance from anterior margin; frontoclypeus 

 narrow, with shallow lateral indentations. Labrum oblong. Mandibles short, 

 without teeth and brush in median depression. 



Pronotum and mesonotum sclerotized. Metanotum with small tergites, 

 2 median and 2 lateral. Forelegs short, massive; mid- and hind legs thin, 

 long; coxae and femora with numerous secondary setae. 



Gills with tufts of filaments, presegmental on abdominal segments 2—7. 

 Tergite of segment 9 narrow posteriorly. Anal legs short, claw blunt. 



511 



