4 (5). Head light, yellowish; median stripe of frontoclypeus and dorsal 



stripes absent; length of visible ends of second and following turns 



of cover usually less than half the length of first turn 



2. G. signatipennis McL. (p. 201) 



5 (4). Head brownish, as in G. a t o m a r iu s; median stripe on frontoclypeus 



and dorsal stripes indistinct; length of second and following turns 



of covering of case longer than first turn 



4. G. sibiricus McL. (p. 212) 



6 (3). Head brownish; median stripe on frontoclypeus and dorsal stripes 



on head distinct; spiral arrangement of fragments not always 

 distinct; case usually made of thin stalks of plants or small, less 

 regular plant fragments 3. G. nitidus Mull. (p. 208) 



157 



1. Grammotaulius atomarius Fabricius 



Degeer, 1778: Plate XllI, Figures 18-21.- Walser, 1864:42-43.- Ulmer, 

 1902b:429-432.- Struck, 1903:86, Plate 1, Figure 8.- Ulmer, 1903:50, 

 Figures C, 2, 14, 24, 86, 94, 111.- Siltala, 1904 c:31-32.- Ulmer, 1909:261, 

 Figure 392.- Lestage, 1921 : 722-728.- Lepneva, 1940:215, Figure 5.- 

 Hickin, 1954:89-92, Figures 1-8. 



Full-grown larva. Length 28—30 mm; sclerites mainly whitish yellow; 

 punctation and large setae reddish brown. Head (Figure 267, A) slightly 

 oblong, with distinct, punctate pattern; antennae situated nearer to seta 7 

 than to eye, sensilla dark. Frontoclypeus anteriorly with 2 pairs of dots 

 on each side, 2 further dots posteriorly and medially; posterior part with 

 distinct large, wedge-shaped pattern; surface slightly dark in some places. 



Dorsal and lateral stripes indistinct, brownish or pale; ventral surface 

 with indistinct brownish area laterally in the anterior part; 2 transverse 

 rows of dots on site of dorsal stripes behind eye; punctation also present 

 lateral to coronal suture, between the stripes and on site of lateral stripes; 

 reddish brown punctation laterally on ventral surface, especially near 

 occipital foramen. 



Median anterior -margin seta and intermediate anterior -margin seta 

 moderately long, the latter slightly larger, lateral anterior -margin seta 

 short, transparent, curved inward; anterior frontal seta also light, 

 procumbent, middle frontal seta long, reddish brown; posterior seta small, 

 thin, brownish. Seta 7 moderately long, thick; seta 9 thick, long; seta 11 

 situated posteriorly, small, brownish; seta 10 short, light; seta 12 situated 

 behind eye, moderately long; seta 14 thick, longer than others; seta 13 

 situated nearby, thin, light brown; seta 15 thin, long; seta 17 thick, dark, 

 moderately long, situated in angle of frontal sutures. Ventral seta 8 small, 

 light brown; seta 18 very small, situated among dots. Gula long 

 (Figure 267, b). 



Labrum (Figure 268) with deep median indentation; dorsal sclerite 

 dark reddish brown; posterior-angle sclerites black at the curvature or 

 on greater part of surface. Mandibles black, with narrow reddish brown 

 margin distally; left mandible with 5 blunt, small, distal teeth, middle 

 tooth larger than others; right mandible with 4 distal teeth, ventral tooth 



195 



