376 



submarginally; one of the 2 primary anterior setae long, situated in middle, 

 longer than on midlegs and the longest on the coxa, with thin (not branched) 

 apex; 2nd seta much smaller, subdorsal; 4—5 short, light setae ventrally 



on coxa, basal one larger than others; 

 _, -' . primary distoventral setae light, 



moderately long, the posterior one 

 slightly thinner and longer. 



Trochanter slightly thinner and 

 longer than on midlegs; anterior seta 

 large, brownish, branched at apex; 

 posterior seta situated more dorsally, 

 longer, light, thin; basoventral seta 

 light, longer than on mid-trochanter, 

 and reaching end of segment; anterior 

 ventral setae, apical and subapical, in 

 form of small, light spines; posterior 

 ventral setae situated near anterior 

 setae, very thin, pale, subapical one 

 short, apical one smaller; a group of 

 minute spinules near apical setae. 



Femur slightly narrower than that 

 of midlegs, also long, with black dorsal 

 stripe; chaetotaxy similar; one (some- 

 times 2) short setae situated sub- 

 dorsally near secondary dorsal setae, 

 as on mid-femur, anteriorly and 

 posteriorly, anterior seta with slightly 

 branched apex; As only anterior 

 primary setae of the coxa and 

 trochanter are branched, it may be assumed that the short, subdorsal setae 

 of mid- and hind femora are anterior and posterior primary setae. 



Tibia and tarsus as on midlegs; tibia slightly wider distally; chaetotaxy 

 the same. Claw similar, long, reddish brown; basal spine large, thin, with 

 5 small, basal spinules. 



Abdominal segment 1 with an indistinct elevation of dorsal side instead 

 of a dorsal process; elevations replacing lateral processes more distinct, 

 situated slightly more ventrally than usual. Lateral line thin, with small, 

 grayish hairs on segments 3—7; sclerotized dots dorsal to lateral line, dots 

 on segment 7 more numerous. 



Gills small, dorsal gills postsegmental (almost intersegmental) on 

 segments 2—7 in form of 2—6 short, thick filaments; pleural gills with a 

 single filament on segments 2—7 immediately below lateral line; ventral 

 gills with a single filament on segments 2—7. Siltala (1905:23) considered 

 these gills as pleural, apparently having overlooked the small gills near the 

 lateral line. 



Tergite of segment 9 pale, whitish yellow, indistinct; setae situated 

 apically and subapically, a median group of 8 long, brown setae, and 5—6 thin, 

 light brown, short to moderately long, setae on each side (Figure 630, A). 



Anal legs short, thick; area "b" incompletely sclerotized, median margin 

 indistinct; sclerite brown, with long ventral process; a row of 10—12 brown 



€30 



FIGURES 630 and 631. Bra c hy c e n t r us subnu 

 bilus Curt.: 



630 - tergite of segment 9 (A), claw of anal leg, 

 inner side (B); 631 — larval case. 



470 



