ratio of length of legs 66 : 100 : 103; punctation distinct on coxae, indistinct 

 on femora. Primary ventral setae of fore femur (Figure 490, A) in form 



of 2 large, pointed, light yellow 

 spines, basal spine slightly thicker, 

 apical longer; posterior seta large, 

 brown, situated above and much longer 

 than basal spine, almost as long as 

 posterior distoventral seta of tro- 

 chanter. Primary ventral setae of 

 mid-femur (Figure 490, B) repre- 

 sented by 2 thin, moderately long, 

 brown spines of about the same size, 

 one situated in middle of femur, the 

 other on its basal part. Primary 

 ventral setae of hind femur (Fig- 

 ure 490, C) in form of a thin, brown 

 spine in middle of femur, similar 

 to that on midlegs, and a moderately 

 long, strong, dark brown seta situated 

 more distally, slightly smaller than 

 distoventral, posterior seta of tro- 

 chanter. Secondary setae numerous 

 only on coxae; femora with only dorsal 

 subapical setae, 3 light thin setae on 

 foreleg and 4 on mid- and hind legs. 

 Dorsal process of abdominal seg- 

 ment 1 small, retracted in fixed 

 specimens; lateral processes normally 

 developed; dorsal process flanked by 

 10 — 12 large and small setae situated 

 on dark dots, and 5 — 6 minute setules; 

 each side of segment with 2 small, 

 setose ventral sclerites. Lateral 

 line on segments 3 — 8, with brownish 

 hairs. Gills in form of thick, long 

 filaments, except pleural gills of 

 posterior segments, which are small, 

 almost rudimentary; segment 2 without 

 presegmental gills. 

 Tergite of segment 9 brown, reddish brown at anterior and posterior 

 margin; large, indistinct dots at anterior margin; medioanal and anterior- 

 angle setae blackish, thick, the former much longer; intermediate seta 

 thin, moderately long, almost as long as anterior -angle seta; lateral 

 setae, a primary and secondary, short, thin; a small thin seta sometimes 

 present between medioanal setae; surface apparently without setae (Fig- 

 ure 491). 



Sclerite "b" of anal legs dark brown, with large, indistinct dots at 

 anterior margin; distodorsal setae black, situated close together; both 

 setae situated further medially, thick, long, lateral seta thinner, moderately 

 „„„ long; subapical seta of median margin the same, a small, thin seta near 

 margin further basally; distoventral seta moderately long, strong, brown; 

 surface with a short and 2 — 3 small, thin setae. 



^91 



FIGURES 490-492. Hydatophylax nigro- 

 V i 1 1 a t us McL.; 



490— right trochanter and femur of foreleg(A), 

 midleg(B), and hind leg (C), posterior; 491 — 

 tergite of abdominal segment 9; 492 — larval 

 case. 



346 



