Number and arrangement of gills of N.c il i ar is (after Siltala) 



(536) 



Segment 



Dorsal 



Pleural 



Ventral 



1 



1-2 





1-3 



2 



2-4 



2-3 



2-4 



3 



3-4 



3-4 



3-4 



4 



2-4 





3-5 



5 



2-3 





3-5 



6 



1(0) 





3-4 



7 







3-4 



8 







2-3 



Siltala (1907:524 — 533) observed 6 larval stages with the following length: 

 Stage 1 - 1.05-1.3 mm; 2 -1.5-1. 9 mm; 3 -5.5 mm; 4 - 6-7 mm; 

 5 — 7— 10 mm; 6 (full-grown larva) length not given by Siltala, but Ulmer 

 (1909:279) gives 12-17 mm.. 



Pupa. Length 9—14 mm. Antennae slightly curved at end, longer than 

 body in male pupae, reaching segments 8—9 in female pupae; proximal 

 segment of antenna longer and thicker than the others, with a median process 

 at base, several small setae on surface. Setae of anteclypeus thin; 

 intermediate and median setae moderately long, intermediate seta larger, 

 lateral seta short, thin. Labrum rounded anteriorly; anterior margin 

 seta small, light; 5 surface setae thin, small, much smaller than setae of 

 con anteclypeus (Klapalek, 1893:44). Mandibles long, curved at end, with 

 serrated inner side; lateral setae short, dorsal seta larger than ventral 

 (Figure 859). 



Wing sheaths reaching segments 6—7 in male pupae, segments 4 — 5 in 

 female pupae. Mid-tarsus (Figure 86 0, A) without natatorial setae, like 

 fore and mid -tarsi.* 



Klapalek (1893:46) states: "Alle Tarsi ganz kahl" (All tarsi quite bare); Thienemann (1905:55): "Ziemlich 

 unverstandlich bleibt mir das Fehlen der Schwimmhaare bei N.ciliaris. Vorbereitet wird es schon bei 

 den Se r i cost o ma-Puppen dutch eine recht schwache Bewimperung der Mitteltarsen" (I find it difficult 

 to understand the absence of natatorial setae inN. ci lia ris; this is already indicated in the pupae of 

 Sericostoma.in which the mid -tarsi have only sparse setae). Ulmer (1909:321) makes similar 

 observations. Siltala (1905:12), on the other hand, inexplicably does not mention the characters of the 

 legs in the description of the pupa of N.ciliaris. We found tarsi without natatorial setae in pupae of 

 N.ciliaris in the Borzhomi area (14V 1951, collected by V.N.Vinogradova). The absence of natatorial 

 adaptations in the pupae of N. c i 1 i a r i s is associated with the shallow aquatic environment of the larvae 

 and pupae; the pupa leaves the water before hatching, not by swimming but crawling on stones or plants 

 near the bank. A more detailed treatment of this subject is found in the first part of this work (Lepneva, 

 1964a: 89, 102). 



670 



