Femora with dark, dorsobasal margin; distal end with two light brown 

 spots lateral to the seta; dorsal setae of forefemur dark brown; those of 

 midfemora and hind femora lighter; basal seta moderately long, situated in the 

 middle of the segment; distal seta, especially on the midlegs and hind legs 

 long, much longer than the basal seta, anterior and posterior seta of the 

 femur of the midlegs and hind legs long; anterior seta shorter than posterior 

 seta; anterior seta on forelegs short, dark and spinelike; posterior seta 

 normal but strong and much shorter than the posterior seta on midlegs and 

 hind legs; ventroanterior seta on forelegs situated at the base, light, 

 spinelike and slightly curved; it is similar but smaller on midlegs and hind 

 266 legs; posteroventral seta situated subapically at the margin not as long on 

 the forelegs as on midlegs and hind legs, where it is as long as the anterior 

 and posterior setae. 



Setae of tibiae of all legs thin, long, dark brown; ventral setae shorter; 

 distodorsal setae on the forelegs not as long as on midlegs and hind legs. 



(265) 



FIGURES 286 and 287. Rhyacophila narvae Navas: 



286 — dorsal sclerite of abdominal segment 9; 287 — left anal leg, outer view. 



5724 



284 



