2 or 3 subdorsal setae at the margin. Anterior surface with small covering 

 setae and several, small, thin setae, including 2 primary setae basally and 

 subventrally; tuft of long anterior surface setae characteristic for coxa of 

 Amphipsyche and Macronema absent in Ae.rossica; small, 

 mainly spinelike, light setae on posterior surface; several of them thin and 

 longer. Dense, pointed, small, light spinules ventrally and posteriorly; a 

 group of light setae, of which 2 yellowish (primary) setae are longer and 

 slightly thicker than others, near margin distally and ventrally. 



Anterior part of base of trochanter with a thin, light, subdorsal seta; 

 2 or 3 short setae situated subventrally near suture; ventral side with 

 4 long, brown setae; distal part with a short, light, primary, anterior seta; 

 ventral side (mainly anteriorly) with long, brownish setae and several, 

 thinner, light setae; distoventral seta in form of a short, blunt, brown spine. 



Femur with convex dorsal surface and slightly concave ventral surface. 

 Sparse short or long setae dorsally, a primary basal seta among them; 

 distodorsal, primary seta brownish; small, light setae near it; a row of 

 21 or 22 long, brown setae on anterior surface, 7 or 8 distal setae shorter 

 than others; anterior surface with isolated, thin, short setae basally and 

 subventrally. A row of 4 long, thin, brown setae in middle of posterior 

 surface. Ventral side with long, brown setae which are sparse in the distal 

 part; several light, thin, less long setae among them. Unlike in Macro- 

 nema radiatu m, fore trochanter and fore femur of Ae. rossica without 

 ventral spinules. 



Tibia with a dense brush of thin, light, long, hairlike setae dorsally, 

 subdorsally on anterior surface and on greater part of posterior surface, 

 except near to base; anterior surface with several, thin, short setae; basal 

 part with 3 or 4 long yellowish setae; ventral side with dense, light, strong, 

 long spines in apical part. 



Tarsus tapering apically; thin, light setae dorsally and subdorsally; 

 these setae are a continuation of dorsal brush of tibia, but are shorter and 

 sparser; posterior part a yellowish, thin, relatively large primary seta 

 distally and dorsally; 4 large, blunt spines anteriorly; a short, subdorsal 

 seta (primary?) distally; 2 short setae subventrally in middle; subventral 

 side with longer setae near apex on posterior surface; ventral side with 

 6 thick, light, pointed spines and a thin seta; a small, light, needle-shaped 

 seta distally; a very small, dark spinule near it. 



If legs are extended, their setae form a dense brush before head. 



Claw massive, almost straight; 2 blunt, spinelike ventral processes at 

 base; anterior process smaller than posterior process; a transparent 



546 light primary seta adpressed to claw between them; small spinules laterally 

 and ventrally near base of claw. 



Mid-tarsus (Figure 770) dorsoanteriorly with a short, thin, primary, basal 

 seta; primary distodorsal seta brown, long; a row of small, thick, light, 

 spinelike, secondary setae among primary setae at anterior margin; 

 posterior distodorsal seta thin, brown, situated near depression; a long, thin 

 seta and 2 small, secondary setae more basally; anterior surface with 



547 small, sparse, covering chetae; several larger sparse setae subventrally; 

 distal margin ventrally, posteriorly and anteriorly with long setae, one of 

 them larger than others. 



Basal part of trochanter with a strong dorsal setule; no long ventral 

 setae in this part; long ventral setae less numerous in apical part than on 

 forelegs, one of them very long; blunt apical spine absent. 



623 



