setae 1 and 3 brown, 3 larger than others; setae 2 and 6 brown, seta 2 

 situated dor sally, moderately long, but sntialler and thinner than 3; seta 6 

 situated subdorsally in distal part, short; ventral setae 7 and 8 straight, 

 light, reaching apex of claw; seta 5 small, light, situated close to 8 near 

 suture; seta 4 brownish, situated medially, slightly larger. 



Number and arrangement of gills of L. st i g m a 



Segment 



Dorsal 



Pleural 



Ventral 



2 



3 

 3 



3-2 



3 



3 

 3 



3 



3 

 3 



3 



3 



3 

 3 



4 



3 

 3 



3-2 



2 



3 

 3 



5 



3 

 3-2 



2-1 



2-1 



3 

 3 



6 



2 



2 



2-1 



2-1 



2-3 

 2-3 



7 



2 

 2 



1(0) 



1 



2-1 



8 



2-1 







1-2 



Case made of transversely arranged fragments of detritus or green 

 plants (Figure 328); if particles are small, the case is straight, tubular, 

 and more or less smooth, but ends of the fragments usually project above 

 tube surface; in spring and early summer, a period of intensive feeding 

 and growth, older larvae make the case from larger pieces, e. g., birch 

 seeds or fragments of sedge leaves, attached by their edge so that case 

 appears bulky; however, posterior end consists of smaller particles; the 

 larvae sometimes use fragments of fresh stalks of moss; the case is then 

 almost spherical. 



Pupa. Length 15.1 — 16.9mm. Antennae reaching segment 8. 

 Anteclypeus light brown; median and intermediate seta thin, brown; lateral 

 seta small, light. Labrum brown, with large, black, hooked setae on lighter 

 background; median process wide, indistinct; seta 1 small, light, situated 

 laterally. 



Mandibles brown, dark brown distally; median blade slightly concave, 

 finely serrated; lateral setae situated basally, short, black; ventral seta 

 slightly smaller than dorsal. Wing sheaths reaching abdominal segment 5. 

 Midlegs with 2 rows of setae on tarsal segments 1—4, setae of ventral 

 margin longer and denser than on dorsal margin; hind tarsi with a few 

 sparse setae on segments 1—3. 



Dorsal process of abdominal segment 1 large, tapering and with a 

 saddle -shaped indentation; surface folded basal to indentation. 



Gills on segments 2—7. Holding apparatus little developed, present on 

 segments 3—7 or 4—7; presegmental plates small, pinkish; number of 

 hooks: 111:0-1; IV:l-2; V:l-3 + 8-12; VI:l-3; Vn:l-2. 



243 



