punctation indistinct on area of dorsal stripes, more distinct on area of 

 lateral stripes. Ventral surface of head less dark; darker and with 

 groups of dots near occipital foramen. Mandibles with blunt teeth. 



Number and arrangement of gills of L. auricula (after Siltala) 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 



3(0) 





3-2 



3 





3(0) 



3 



3 



3 



3-2 





3-2 



3 





2-1 



3 



4 



3-2 



2(0) 





3-2 



2 





1 (0) 



3-2 



5 



3 



1(0) 





2 



2-1 







2-1 



6 



2-1 







2-1 



2-1 







2-1 



7 



2-1 







2-1 



2(0) 







2-1 



8 



2(0) 







1(0) 



(227) 



Pronotum light brown; groove in anterior third, dark in middle. 



Mesonotum darker than pronotum anteriorly and in middle, lighter laterally 



and at posterior angles (Figure 398); 

 posterior margin black, interrupted 

 in middle; lateral margin wider, with 

 well marked posterior -angle areas. 



Primary ventral setae of fore femur 

 in form of 2 light spines; posterior seta 

 short, situated between spines. Ventral 

 setae of mid- and hind femora strong, 

 dark, of different lengths. 



Tergite of segment 9 yellowish, 

 indistinct, without punctation, with 8 

 primary setae at posterior margin and 

 5—6 setae between the former and on 

 surface. Claw with a dorsal denticle and 

 small blunt spinules lateral to it. 



Case 11 — 15 mm long, usually smooth, 

 slightly narrower posteriorly, made of 

 longitudinally arranged small plant 



particles, each overlapping the next; anterior end truncate; posterior end 



open or closed by a membrane with a large round hole (Figure 399). 

 Pupa. Length 10.5 — 11.7 mm. Antennae reaching segment 7 or 8. 



Distal part of mandibles relatively wide, with slightly convex outer and 



inner sides. 



FIGURES 398-400. Llmnophilus auricula 

 Curt, (after Struck): 



398 — head, pronotum, and mesonotum; 399 — 

 case of larva (A) and pupa (B); 400 — anal rods 

 of pupa. 



5125 



284 



