seta; posterior surface with 11—13 secondary setae; primary distoventral 

 setae thick, moderately long, anterior seta brown, slightly larger than dark brown 

 posterior seta. Anterior seta of trochanter short, light brown, branched 

 apically; posterior seta long,brownishblack; posterior distoventral seta the 

 same; basoventral seta also long, grayish; apical and subapical anterior, 

 ventral setae in form of large spines; posterior subapical seta forming a 

 short, light, thick spine, in contrast to other species of the genus. Femur 

 with slightly convex dorsal, and straight ventral margin; basodorsal seta 

 moderately long, thinner, and slightly longer than brown apical dorsal seta; 

 several smaller secondary setae between primary setae and more basally; 

 anterior primary seta short, thick, dark brown, posterior seta situated 

 ventrally in the subapical area, black, long; ventral setae in middle of 

 segment situated close together and forming a short, yellowish, spine-shaped 

 seta, and a more basal, light, large spine; posterior surface with several 

 thin secondary setae; subventral area with 2 large, dark brown setae; 

 anterior surface with 6 small setae, including 2 larger light setae. Tibia 

 thinner than on midlegs, with markedly widened apex. 



Lateral line on segments 2 — 7 in a row of small, white hairs; 2—3 reddish 

 dots above the hairs near anterior margin of segments 3—6. 



Number and arrangement of gills of A.subtilis 



Segment 



Dorsal 



Ventral 



2 



1 



1 



1 



1 



3 



1 

 1 



1 



4 



1 



1 



5 





1 



6 





1 



Tergite of segment 9 chestnut brown, with 2 large, darker dots near 

 anterior margin; large setae black; primary medioanal setae thick, strong, 

 long, larger than anterior-angle setae; 3 setae between them, including 

 2 thick, moderately long setae; 8—9 setae including an intermediate and 

 a lateral primary seta between medioanal and anterior-angle setae; 

 3—4 setae lateral to anterior-angle setae; surface with 3 setae on each 

 side. 



Sclerite "b" of anal legs with small tubercles; distal median seta thicker 

 and longer than the medioanal seta of the sclerite of the segment 9; 

 neighboring seta much shorter and thinner; lateral seta moderately long, 

 brown, thin; subapical seta thinner, equally long, ventral seta short, thin. 

 Sclerite "c" yellowish, with broad, dark, reddish brown lateral margin; seta 

 small, light. 



Claw chestnut brown, dark reddish brown apically, without dorsal denticle; 

 seta 1 situated in middle of basal area, short; seta 2 light, grayish, thin. 



147 



