primary setae, some secondary setae long; anterior and posterior seta 

 situated subventrally at distal margin, both long, dark; anterior surface 

 with several small setae; 2—3 longer setae at distal margin; anterior 

 surface ventrally and subventrally with 22—23 small, thick, light spines; 2 

 long, strong, dark, primary, ventral setae and 3 — 4 moderately long, thin, 

 secondary setae behind spinules; basal part with thin, whitish, long chaetoids 

 between setae. 



Tibia shorter than femur, rodlike, not wider distally; dorsal side with 7 

 long, thin setae and several smaller setae; an anterior and a posterior 

 primary seta at distal margin, both long, dark; other secondary setae situated 

 among secondary setae; anterior side with 3 short, strong, secondary setae 

 subdorsally, with 2 large and 3 small spines subventrally; posterior side 

 with 4 small, thin setae, 2 slightly longer setae subventrally; a row of 9 

 large, strong spines ventrally. 



Tarsus straight, shorter and narrower than tibia, not tapering distally; 

 dorsal side with 2 pairs of long, thin setae near distal margin and in middle; 

 several, short setae situated between forn:ier and more basally; anterior side 

 with a large spine subventrally; posterior side with a long, brown subapical 

 primary seta, a thin smaller seta slightly more basally; ventral side with 

 5 large, light spines, as on tibia. Claw strong, slightly curved, with a light 

 basal spine. 



Hind leg natatorial (Figure 775). Coxa long, almost uniformly high, with 

 several large brownish spots at base; surface with minute spinules anteriorly 

 and ventrally as on forelegs. Basal part with a group of setae including a 

 large basodorsal seta; 2 rows, anterior and posterior, of thin, short, and 

 long setae further along coxa; anterior and posterior distodorsal setae 

 long, strong, dark brown; anterior surface with several smaller secondary 

 setae in addition to long primary setae; ventral and posterior subventral 

 areas with long dense setae, among them both primary distoventral setae 

 near margin. 



Trochanter long, rodlike as are femur, tibia, and tarsus; anterior and 

 posterior seta short, dark; anterior surface with 4 — 6 secondary setae; 

 thin, relatively short to long setae situated dorsally, ventrally, and on 

 posterior side. 



Femur slightly longer and wider than trochanter; anterior primary seta 

 situated subapically, long, strong, reddish brown; several, small, secondary 

 setae situated more basally on anterior side; a distodorsal seta and several, 

 small, thin, light setae at dorsal margin; 20—22 long, dense, natatorial setae 

 subdorsally on posterior side; 2nd natatorial row of similar long, thin 

 setae on ventral side, including both primary setae; primary distoventral 

 seta longer than others. 



Tibia divided, much longer than femur, with several small setae and one 

 long, thick, dark brown (primary? )subventral seta anteriorly; 2 rows of 

 natatorial setae, a posterior subdorsal row of numerous, long, thin setae, 

 and a ventral row of similar long setae. 



Tarsus shorter and thinner than tibia; posterior dorsal row of natatorial 

 setae with thin setae which are shorter than on tibia; thin, long setae of 

 ventral row alternate with large, strong spines. 



Claw long, thin, slightly curved, with spine- shaped basal seta. 



First abdominal segment much shorter than metathorax and 2nd abdominal 

 segment, as in Mystacides; dorsal process high, conical, with retractile 



605 



