Legs (Figure 569) light brown, slightly reddish in some places; arti- 

 culations between coxa and trochanter, and between tibia and femur, black and 

 dark brown; ratio of length of legs 83:100:99. 



Fore coxa less massive than in Limnophilidae, relatively longer, 

 resembling long mid- and hind coxae; distodorsal indentation of all coxae 

 shallow. Femora long, slightly curved; mid-femur thinner and longer than 

 others; dorsal margin convex, ventral margin of fore and mid-femora 

 concave, almost straight on hind femur; tibiae and tarsi straight, reddish 

 at apex, slightly shorter and more massive on forelegs than on other legs; 

 tibia not wider distally; tarsus slightly narrower. 



Setae as in Figure 569; secondary setae, in contrast to Apatania and 

 Silo, restricted to coxae, few on forelegs, more numerous on hind legs 

 than on fore- and midlegs. Primary anterior setae of coxa and trochanter 

 of foreleg short, as in Apatania, with slightly bifid apex. Hind trochanter 

 with long posterior seta as in Apatania; posterior subapical, ventral seta, 

 in contrast to Apatania, long, thin, and dark as posterior apical ventral 

 seta. Primary dorsal setae of fore and mid-femora of equal length; apical 

 seta larger than basal on hind femora; primary ventral setae of fore femur 

 situated close together, slightly proximal to middle, (anterior) apical ventral 

 seta represented by a large, thin, yellow spine; basoventral (posterior) 

 seta not spine- shaped as in Apatania, but dark, large, strong, slightly 

 shorter and thicker than posterior surface seta; the latter situated sub- 

 ventrally, dark brown, moderately long, near primary setae, not basal, but 

 slightly apical to them. Primary ventral setae of midleg situated close 

 together, in about middle of segment, resembling those on forelegs, apical 

 (anterior) seta in form of a large, pointed, yellow spine; basal (posterior) 

 seta dark, moderately long; posterior surface seta long, situated distally 

 at ventral margin. Apical ventral (posterior) seta of hind femur 

 moderately long; basoventral (anterior) seta represented by large, yellowish 

 spine; posterior surface seta shorter than distoventral seta; position, 

 coloration and form of setae as on the mid-femur. Brown setae of mid-tibia, 

 tarsus, and claw as in Figure 569, B; those of hind legs (Figure 569, C) 

 slightly longer, those of forelegs shorter, thinner, and lighter. 



Abdomen uniformly wide from segments 2—8; segment 1 wider, with 

 large dorsal and lateral processes. Lateral line from middle of segment 3 

 to end of segment 8. Gills with 2—3 filaments, in dorsal and ventral rows 

 on segments 2 — 7, in a pleural row on segment 2. 



Tergite of segment 9 (Figure 570) represented by an indistinct white, 

 hardened, membranous area; medioanal seta moderately long; anterior- 

 angle seta reddish brown, smaller; 2 setae between medioanal setae; 

 2 moderately long, primary setae, intermediate and lateral, and usually a 

 small, secondary seta situated between medioanal and anterior-angle setae. 



Sclerite "b" of anal legs thin, whitish, dorsally, brownish laterally, brown 

 at apex, reddish brown ventrally; distodorsal seta large, black; neighboring 

 seta also long, black; subapical seta at median margin similar, slightly 

 smaller; ventral seta brown, moderately long, situated slightly more lateral 

 than usual. Sclerite "c" yellowish brown, with broad, blackish brown, lateral 

 margin and a small, brown seta. 

 328 Claw brown, reddish brown apically, with a large, dorsal denticle, in 

 contrast to Apatania; basal part and some apical areas with small 



411 



