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c-po setae; posterior surface .with short, thin spinules and a posterior subventral 

 primary seta; 30—31 thin, long setae ventrally, among them both primary 

 setae. Tibia narrow, much longer than femur, with 16 long, thin setae, 

 including 4 primary setae dorsally and with short, thin setae and a row of 

 small spines ventrally. Tarsus thin, straight, with 8—10 setae, including 

 4 primary setae dorsally. Claw thin, slightly curved, with a small, basal 

 seta. 



Abdominal segment 1 without dorsal or lateral processes; anterior part 

 with lateral rows of large, paired spinules. Gills and lateral line absent. 

 Dorsal setae of segments 1—7 small, thin; pleural setae of segment 1 

 relatively large, one of them larger than the other; segments 2—8 with 

 2 small, primary pleural setae and small secondary setae situated in 

 anterior half of segment 2, on whole of segment 3, on greater part of 

 segments 4—7, and in posterior half of segment 8 (Nielsen, 1942:423—424). 



Abdominal segment 9 without tergite; medioanal seta and anterior -angle 

 seta situated near posterior margin and larger than the others. 



Anal legs (Figure 834) divided by a longitudinal fold into a median and a 

 lateral lobe. Sclerite "b" in form of narrow basoventral stripe; distodorsal 

 seta of area "b" long, thick, almost twice as long as anal leg, situated at 

 apex of a "support" — a teat -shaped membranous process of the posterior 

 margin; other setae thin, 53—59 in number, situated near distal seta in 

 posterior part. Sclerite "c" in form of small triangular plate; seta small, 

 yellow. 



Sclerotized part of claw (Figure 834) with a narrow, membranous, lateral 

 cross-stripe subventrally; ventral and median sides almost entirely 

 membranous; distal part strongly sclerotized, dark brown, with 2 dorsal 

 denticles. Secondary setae situated in a fan dorsally, on median side near 

 apex and ventrally between setae 7 and 8; primary setae 1,2, and 3 long, 

 situated dorsally among secondary setae. Seta 5 short, strong, situated on 

 membrane near seta 8; setae 7 and 8 long, curved, light; seta 6 thick, long, 

 situated on sclerite near the end of membranous cross-stripe. 



Case (Figure 835) 6 — 8 mm long, slightly tapering posteriorly; anterior 

 margin straight, without dorsal process; posterior membrane with a wide, 

 elliptical slit. 



Pupa. Case as long as in larva, attached at anterior end by broad, 

 loosely woven ligaments; anterior opening covered by a large-holed, 

 outer membrane; inner membrane 0.1—0.2 mm from anterior end, dense, 

 with a narrow, curved slit at ventral margin; posterior membrane as in 

 larva or narrower, with a wider hole. 



Mode of life and habitats. Springs, helocrene springs, edge of 

 limnocrene and rheocrene springs, among humid plants and detritus. 

 Feeding on microphytobenthos, especially mycelium of fungi. 



Distribution. Western part of the European USSR (Latvia, Leningrad 

 region, western part of Ukraine). In addition, Europe. 



2, Beraea maurus Curtis 



Morton, 1890:231-233, Plate II, Figures 1-8.- Ulmer, 1903:96.- 

 Thienemann, 1905b: 529-530, 547,553, 555, Figures 52-56, 109.- Ulmer, 1909 

 243-244.- Lestage, 1921:942, 953-954.- Thienemann, 1923:181-186, 

 Figures 2, 5, 6; 1925:50, Figures 21.- Hickin, 1959:87-88, Figures 11-20. 



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