4. Apatania stigmatella Zetterstedt 



Lepneva, 1949: 180-181.- Flint. 1960:28, Figure 10. 



Full-grown larva. Length 7— 8 mm. Head (Figure 203, A) brown 

 dorsally, anteriorly in the middle, and partly along coronal suture: posterior 

 part yellowish near occipital foramen: ventral surface light brownish, 

 white near occipital foramen; sclerite with chestnut brown median margin 

 near gular suture. Dark part of dorsal surface with small spinules, some 

 thick at the base or situated on small tubercles; a transverse stripe of 

 smaller spinules between dark and light area; spinules situated on surface 

 singly or in rows; ventral surface reticulate with denticles or rows of 

 spinules on margin of cells; middle with larger single spinules on smooth 

 surface near gular suture. Gula pale brownish, in form of an oblong 

 triangle with rounded sides (Figure 203, B) and posterior angle; posterior 

 half with small, isolated spinules. 



Median and intermediate anterior -margin setae reddish brown, thick, 

 moderately long, the former slightly shorter; lateral anterior -margin seta 

 short, light; anterior -frontal seta light, longer than lateral; median 

 frontal seta small, posterior seta moderately long, thin, light brown basally. 

 Seta 7 thin, brown, moderately long; seta 10 short, light brown, situated 

 laterally anterior to eye; seta 9 thick, long, reddish brown; seta 11 situated 

 posteriorly near middle of eye, thin, light; seta 14 largest on the head, 

 larger than 9; seta 13 situated nearby laterally, light, small; seta 12 

 moderately long, light; seta 15 situated behind 14, brown, thin, long, but 

 shorter than 14; seta 16 short, light; seta 17 moderately long, brown, 

 thick basally, filiform apically, situated anteriorly flanking the fork of 

 frontal sutures; ventral seta 8 brown, short, thick; seta 18 small, light. 

 Anterior part of frontoclypeus with 12 — 13 secondary setae laterally, 3—4, 

 sometimes most of them, reddish brown, the others light; posterior part 

 with 4 small, secondary setae laterally; 18—19 small, light, secondary setae 

 laterally to frontal sutures between suture and eye, from antennae to 

 level of seta 17; these setae are shorter than in anterior part, but also 

 thick; several dark setae usually anteriorly and laterally, in area of seta 9. 



Dorsal sclerite of labrum yellowish, with small, dense spinules on small 

 tubercles. Seta 1 small; setae 2 and 4 relatively large, light, pointed, 

 situated on membrane and on sclerite flanking median indentation; setae 

 5 and 6 situated lateral to median indentation, brown, 5 larger than 6; 

 seta 3 situated lateral to 5, brown, slightly smaller. 



Mandibles long, black, with pinkish brown, distal part; brush situated 

 near dorsal margin, consisting of 29—30 light feathered hairs; dorsal 

 lateral seta brownish, short, much larger than small, light, ventral seta. 



Sclerites of cardo (Figure 203, b) light yellow in middle, black in 

 lateral parts, with a small, light seta laterally. Submentum in form of 

 small brownish plates; setae short, thin, brownish. Stipes light brownish; 

 setae short, about the same length. Palpifer light brown; distal seta, 

 short, grayish brown, situated on process; median seta small, light. 



Palps and galea short. Mentum in forna of a narrow, reddish brown 

 semicircle; ventral rods long, grayish, with a small, light, apical seta. 

 Palpiger horseshoe -shaped, relatively large, light. 



153 



