spinulesj setae as in Apatania; median seta 1 situated basally, short, 

 relatively thick, brown; seta 3 situated subdorsally in distal part, moderately 

 long; seta 2 situated dorsally above suture, brown, thin, moderately long; 

 seta 6 situated lateral and distal to suture, thin, shorter; ventral setae 7 and 8 

 light; seta 7 situated on membrane, seta 8 on sclerite as in Apatania; 

 seta 5 situated slightly lateral to seta 8, small; seta 4 moderately long, 

 situated medially. 



Case 12—15 mm long, made of sand grains, smooth, slightly curved, 

 narrower posteriorly, with flat ventral side, with 4—5 large, flat, sand 

 grains or small stones attached at margin, giving a winged appearance; 

 anterior opening directed obliquely downward, posterior opening closed by 

 a membrane with a single, round hole (Figure 571). 



Mode of life and habitats. Brooks and small rivulets with a 

 slow current; littoral of lakes with moderate surf, on solid bottom, rarely 

 with some silt. 



Distribution. Western, northwestern, and central parts of the 

 European USSR, the Central Urals. In addition. Central, Western, and 

 Northern Europe. 



2. Goera sajanensis Martynov, larva nova 



Full-grown larva. Length 10—11 mm. Head (Figure 572, A), widest at 

 level of eyes, nai-rowei- anteriorly, dorsal surface darker than in G. pilosa, 

 mainly chestnut brown, darker in some places, lighter posteriorly; flat 

 dorsal area smaller than in G. pilosa but more distinct. Middle and 

 posterior part of frontoclypeus smooth, except for a small median group of 

 blunt tubercles; anterior part longer than in G. pilosa, with small pointed 

 tubercles; tentorial pits dark brown; light dots on site of wedge-shaped 

 pattern. Flat area with smooth stripes, without tubercles, situated lateral 

 to frontal sutures and bordered anteriorly by ridge with pointed tubercles 

 and extending from anterior frontal seta to eye; bordered laterally by a 

 dense row of large, dark, blunt tubercles, appearing as a continuous dark 

 band under low magnification; area lateral to this stripe (to eye) with 

 similar, but less dark, tubercles; tubercles smaller before and behind eye, 

 pointed and small on ridge; area near occipital foramen smooth; a light 

 yellowish area behind fork; posterior part with several, large, brown dots 

 laterally. Ventral surface (Figure 572, B) lighter, brown, reticulate, smooth 

 near occipital foramen, with several dark dots. Gula brown, narrow, in form 

 of long triangle, with irregular margin; margins of gular suture separated. 

 Setae as in Figure 572; intermediate anterior-margin seta larger than in 

 G. pi lo s a, thicker than others, one of longest on head; median seta short, 

 dark; lateral seta slightly larger, light; anterior frontal seta short, dark, 

 situated more posteriorly than usual, closer to tentorial pit; intermediate 

 frontal seta similar, situated close to anterior seta and resembling it in 

 form and color; posterior -frontal seta small, thin; seta 7 straight, strong, 

 brown, moderately long; seta 9 slightly shorter, light brown; seta 10 small, 

 32 9 thin, situated before eye; seta 11 situated medially to eye, small; seta 12 

 situated laterally behind eye, short, yellowish; seta 13 situated medially to 

 12, small, light; setae 14 and 15 about the same length, situated near 13 



5725 



412 



