1. Hagenella clathrata Kolenati 



Struck, 1904:1-7, Figures 1-5. 

 1909:239, 302, Figures 439,440.- 

 192.- Lepneva, 1940:208. 



- Siltala, 1904c: 6-8, Figure 1.- Ulmer, 

 Lestage, 1921 : 555-557, 572-579, Figure 



Full-grown larva 



without dark median 

 posteriorly; lateral 



HGURES 97 and 98. 

 Hagenella clath- 

 rata Kol. (after Siltala): 



97 — pronotum; 98 — 

 case of pupa. 



6 — 10 rings (Figure 

 Mode of life 



other small, overgr 

 Di st r ibut ion 



USSR. In addition, 



. Length 20-22 mm. Head oblong. Frontoclypeus 

 pattern, with dark stripes laterally which are fused 

 stripes wider in dark specimens, sometimes greater 

 part of sclerite dark, except for the posterior angle; 

 sclerite with a transverse, posterior row of dots. 

 Dorsal and lateral stripes wide, with numerous 

 dots; groups of dots on each side on the ventral 

 surface. 



Labrum, mandibles and maxillolabium as in 

 Oligostomis reticulata. 



Pronotum (Figure 97) brownish in anterior third, 

 with a wide, transverse, dark stripe some distance 

 from anterior margin, dark dots in posterior part. 

 Median sclerites absent. 



Legs yellowish brown. Fore tibia, as inSemblis, 

 not wider distally; anterior ventrodistal seta reduced 

 to p small spinule; posterior ventrodistal seta in form 

 of thin, light spine, procumbent. 



Tergite of abdominal segment 9 uniformly brown; 

 lateral setae large but shorter than medioanal setae. 

 Claw of anal legs with 3 denticles. 



Case resembling that of S e m b 1 i s, large, to 35-40 mm 

 long, slightly curved, made of rectangular fragments 

 arranged in 6—8 rings. 



Pupa. Length 15-1 8 mm. Antennae reaching 

 abdominal segment 6. Frontal sclerite anteriorly 

 with large, grooved, rounded process with small 

 lateral tubercles. One of the 6 setae of labrum much 

 longer than the others. Mandibles with reduced apex, 

 as in Oligostomis. 



Fore tarsi without natatorial setae, sparse on mid- 

 tarsi, hind tarsi with a few setae. 



Gills on abdominal segments 2-7 and presegmental 

 on segment 8. Spinules of holding apparatus: 111:6-11; 

 IV:7-14; V: 9-17 + 10-17; VI:8-13; Vll:6-15. 



Case longer than that of larva, to 40 mm long, with 

 98), anterior end covered with moss, 

 and habitats. Small swamps, ditches, puddles, and 

 own, stagnant water bodies. 



Northwestern, central, and western parts of European 

 Central and Northern Europe. 



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