Full-grown larva. Length 22.0—24.5 mm (Figure l). Head 

 (Figure 2) slightly compressed dorsoventrally, yellow, with distinct dark 

 pattern. Pattern on frontoclypeus widened juglike posteriorly, usually 

 not reaching frontal sutures in the posterior angle (rarely reaching or 

 almost reaching sutures); 4 asymmetrical dark dots in anterior part 

 lateral to dark stripe; a curved transverse row of dark dots in the posterior 

 part. Dorsal stripes distinct, with numerous dark dots; stripes extending 

 from anterior to posterior margin of head, meeting near the coronal suture. 

 Lateral lobes also distinct, with groups of dots; a large light area between 

 dorsal and lateral stripes. Groups of large dots ventrally in each half. 

 Gula brownish, with distinct, dark brown lateral margin. Setae usually 

 dark, reddish brown. 



Outer anterior -margin seta short, light, curved inward, situated at angle 

 of sclerite; intermediate seta situated nearby, straight, thin, long; median, 

 anterior -margin seta slightly thinner situated at some distance; anterior 

 and middle frontal setae situated one behind the other (Figure 2, A), short, 

 thin; posterior frontal setae slightly longer, dark, situated lateral to the 

 wide part of the dark pattern. Seta 9 strong, long, on light line of dorsal 

 stripe; seta 11 thin, short, situated behind seta 9; seta 7 strong, moderately 

 long, situated near antenna; seta 10 short, situated lateral to the eye; 

 seta 12 long, situated behind the eye; seta 14 the longest on the head, longer 

 than seta 12, both of them dark, thick; seta 13 small, situated lateral to seta 

 14; setae 15 and 16 situated posteriorly in one row, thin, much shorter 

 than seta 14; seta 17 situated near coronal suture, thin, large. Ventral 

 seta 8 situated near anterior margin (Figure 2, b) short, thin; seta 18 

 situated in posterior part of head, small, thin, among group of dots. 



Labrum (Figure 3) with deep median indentation of anterior margin, as 

 characteristic for Phryganeidae, with a group of dark median dots 

 posteriorly; sclerites of posterior angles dark brown, with blackish brown 

 dots basally. Setae 1, 2, and 4 small, light, curved inward; seta 3 dark 

 brown, straight, long, situated laterally and submarginally in middle of 

 sclerite; seta 6 large, dark, situated lateral to median indentation; seta 5 

 similar, situated nearer the margin. 



Mandibles (Figure 4), both right and left, with distinctly projecting apical 

 tooth; upper blade of left mandible with 3 additional teeth, lower blade with 

 2 teeth; right mandible with one tooth on the upper blade, 2 on the lower 

 blade, one of them large; outer setae brownish, slightly curved, dorsal 

 apical seta slightly shorter than the ventral basal seta. 



Submentum light, its sclerite thin, whitish, indistinct, heart-shaped; setae 

 short, reddish brown, situated on sclerotized dots near the anterior margin, 

 near the base of the round anterior-angle processes. Sclerites of cardo 

 distinct, brownish, with a small thin seta; stipes light brown, with dark 

 inner margin, setae thin, dark, basal seta situated on membrane, apical 

 seta near anterior margin. Palpifer dark brown; median basal seta 

 small, thick, light, apical seta situated on membrane near anterior margin. 

 Galea cylindrical, with dark sclerite; setae and sensillae large; palps 

 short, with dark brown sclerites, first segment slightly larger than the 

 others, 4th segment small. Mentum blackish brown, horseshoe -shaped, 

 short in the middle, with blackish anterior margin. Ventral sclerites dark, 

 rodlike, with a small light seta at the distal margin; labial palpiger clearly 

 defined, sickle -shaped, dark brown; labial palps relatively large, with 

 brownish sclerite and thick terminal sensillae. 



19 



