Number and arrangement of gills ofH.infumatus (after Siltala) 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 

 3 



2 



2 



2 

 3 



3 



3 

 3 



3 



2 



3 

 3 



4 



3 

 3 



2 



1 



3 

 3 



5 



2 



2 



1 



1 



3 

 3 



6 



2 



2 



1(0) 





2 

 3 



7 



2-1 



1 







2 

 2-1 



8 



1(0) 







1(0) 



Coxae brownish yellow, other segments of legs yellow, punctation 

 sharp, reddish brown; ratio of length of legs 62 : 100 : 97. Primary ventral 

 setae of fore femur (Figure 423, A) in form of 2 small, light spines, a blunt, 

 basal spine and a thin, pointed, apical spine. Distoventral seta of mid- 

 femur (Figure 423, B) in form of a large, brownish spine in middle of 

 segment, a strong, moderately long, dark seta further basally; mid- 

 trochanter posteriorly with 2 small, secondary setae in addition to primary 

 ones. Primary, basoventral seta of hind femur (Figure 423, C) spine-shaped, 

 black, large, situated in middle of femur, second ventral seta much longer, 

 situated more distally; hind trochanter with 4 small, secondary setae 

 posteriorly. 



Lateral line from middle of segment 3 to end of segment 8, consisting 

 of small, light hairs. 



Tergite of abdominal segment 9 (Figure 424) light yellow, with indistinct 

 punctation at anterior margin; medioanal setae black or blackish brown, 

 thick, moderately long; anterior -angle setae also large, dark; intermediate 

 and lateral seta thin, brown, short; a thin, dark, moderately long, and a 

 small, brown seta situated between medioanal setae. 



Sclerite "b" of anal legs reddish brown, large, distal setae black or 

 blackish brown; medioanal seta thick, black; intermediate seta slightly 

 smaller; lateral seta moderately long; a dark, moderately long seta situated 

 apically at median margin; surface with 4 — 5 small setae. Sclerite "c" 

 light brown; basal seta small, dark. Claw with a dorsal denticle; setae 

 brown, except ventral setae; seta 1 situated dorsally, thicker than others, 

 situated laterally in basal part; seta 2 situated subdorsally; seta 6 short, 

 situated laterally near end of suture; seta 3 situated subdorsally in distal 

 part; setae 4 and 5 small, thin, situated near light, ventral seta 8; seta 7 

 brownish, situated near base of claw. 



301 



