Number and arrangement of gills of Ph. brevipennis 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 

 3 



3 



3 



3 

 3 



3 



3 

 3 



3 



2 



3 

 3 



4 



3 

 3 



2 



1 



3 

 3 



5 



3 

 2 



2 



1 



3 

 3 



6 



2 

 2 







1 



2 

 3 



7 



2 

 2 







2 

 2 



8 



2 









Case trihedral, made of green or dark, overlapping fragments of leaves; 

 inner tube cylindrical (Figure 415). 



Pupa. Length 11 — 12 mm. Wing sheaths reaching abdominal segment 

 4. Midlegs natatorial. Dorsal process of abdominal segment 1 less pro- 

 jecting than in Limnophilus; saddle- shaped process with shallow 

 depression, with wide, lateral, rounded lobes with numerous, small spinules 

 (Figure 416, A). 



Plates of holding apparatus small, brown; number of denticles: 111:2; 

 IV: 1-2; V: 2 +8-12; VI: 2; VII: 2-3. Lateral line from end of segment 

 5 to 8. Gills on segments 2 — 8, as in larva. 



Anal rods shorter than in Limnophilus; according to Struck (1903: 

 92, Plate VI, Figure 18a), small spinules are restricted to distal part; 

 setae, except basal seta, situated apically and subapically (Figure 416, B). 



Case trihedral, as in larva. 



Mode of life and habitats. Small, stagnant, often swampy 

 water bodies. 



Distribution. Western, northern, and central parts of the European 

 USSR; Urals, Western and Eastern Siberia to Irkutsk. In addition. Northern 

 and Central Europe. 



6. Genus Anabolia Stephens 



Full-grown larva. Length 16 —24 mm. Dorsal side of head with charac- 

 teristic, pattern of bands, spots, and large dots. Pronotum and mesonotum 

 light, with a distinct pattern. 



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