subapical seta of the 5 ventral setae thin, dark and long, the others spinelike 

 and light; the posterior, dark brown surface seta near the dorsal angle of the 

 trochanter of the midlegs and hind legs is long; anterior seta short and 

 yellowish; ventral subapical posterior seta long and dark, the other 4 ventral 

 setae light and spinelike. 



Dorsal setae of femur of forelegs brown and long; basal seta shorter than 

 distal seta; posterior seta short, situated subapically; anterior seta light 

 yellow and small; posterior of the 2 ventral setae situated at the margin of 

 the sclerite, longer than the light anterior seta which is situated further 

 basally. Posterior setae of femur of midlegs and hind legs dark and long; 

 other setae (except the basoventral seta) slightly longer than on the forelegs. 



Setae of tibia and tarsus of all 3 legs similar, differing only slightly in 

 length. Both distodorsal setae of tibiae situated behind each other, dark 

 brown, relatively long; posterior seta situated subdorsally and also long; 

 anterior seta shorter and situated closer to the ventral setae, which are 

 small, light and spinelike (Figure 351, B). Dorsal setae of tarsi of all 

 3 pairs of legs dark, thin, almost as long as the claw; distoventral setae thin, 

 slightly longer than those on the tibiae; they are soft, with a long thin end. 

 Claw strong, blunt, with a short basal process and a transparent, spinelike 

 seta (Figures 350, B and 351, C) at the apex. 



First abdominal segment slightly smaller than the following segments; 

 segments 3 and 4 are the largest. Anterior-margin setae of all segments 

 small, little marked, setuliform; anterior -angle and medioanal setae thin, 

 dark, distinct; intermediate and lateral anal setae small. 



[303) 



FIGURES 352 and 353. Mystrophora altaica Mart.: 



352 — dorsal sclerite of segment 9, anal legs and anal gills; 353 - outer view of claw of right 

 anal leg. 



Sclerite of segment 9 trapezoidal (Figure 352), with a long convex 

 posterior margin and a shorter anterior margin; anterior-margin setae 



329 



