527 



Abdomen nearly cylindrical. Gills absent. Thick seta of anal legs 

 black, situated at apex of a high, conical process and curved downward 

 and slightly inward, so that opposite setae are crossed (Figure 844). 



Case smooth, made of small sand grains, with convex, posterior 

 membrane. 



Mode of life and habitats. Outside water in humid detritus 

 and moss near springs. 



Distribution. USSR: Caucasus. Not recorded outside USSR. 



2. Ernodes articularis Pictet 



Thienemann, 1923:182-186, Figures 1, 4, 8, 9.- Botosaneanu, 1959: 

 136, 137, Figure 18.- Hickin, 1959:84-85, Figures 22-25. 



Full-grown larva. Length 

 4.5-4.6 mm. Head (Figure 845) 

 brownish; posterior angle of 

 frontoclypeus with small, brown 

 dots; large, dark dots lateral to 

 coronal suture and posterior part 

 of frontal sutures; setae light. 



Pronotum (Figure 846) with wide, 

 light yellow, anterior margin; trans- 

 verse ridge dark, distinct; surface be- 

 fore the ridge dark, reddish brown, with 

 thin, light setae, surface behind ridge 

 light; anterior-angle processes with 

 dense, thin, short setae. Claw of hind 

 legs shorter than in B e r a e a, less than 

 half as long as tarsus. Area "b" of anal 

 leg with a high process or support, about 

 1/4 as long as black, thick seta (Fig- 

 ure 847, A, B); a short, strong seta near- 

 by; lateral seta at base of cone about half 

 as long as first seta; other setae small, 

 thin. Claw with a dorsal denticle. 



Case smooth, made of small sand 

 grains, sometimes with diatoms at 

 posterior end (Botosaneanu, 1959: 

 136, 137); posterior membrane convex, 

 projecting dorsally like a roof above 

 central hole (Figure 848). 



Pupa. Mid -tarsus without natatorial 

 setae (Figure 849). Gills absent. Anal 

 appendages as in B e r a e a, short, wide 

 at base, tapering posteriorly. 



Mode of life and habitats. 

 Outside water near springs in humid 

 environment. 



Distribution. Western part of 

 European USSR. In addition, Europe, 

 mainly Central Europe. 



8^8 



FIGURES 845-849. Ernodei 

 Pict.: 



8^9 



articularis 



845 —head, dorsal; 846 — pronotum (diagram- 

 matic); 847 - left anal leg, lateral (A),distodorsal 

 process of the area "b" (B); 848 - posterior end 

 of larval case; 849 — distal end of mid tibia and 

 mid -tarsus of pupa (845— 847, A — after Hickin; 

 the rest after Thienemann). 



658 



