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1. Semblis phalaenoides Linne * 



Siltala, 1902:30-33, Figure II. - Ulmer, 1903:42, Figure 48; 1909:238, 

 Figure 364 b.- Lestage, 1921:555, 572-579, Figure 1 92 f . - Raciecka, 1925: 

 1-8. - Lepneva, 1940:208. 



Full-grown larva. Length to 45 mm. Sclerites brownish yellow, 

 membranous areas reddish. Head slightly oblong, sides nearly parallel 

 in the middle (Figure 74). Tentorial pits with dark dot; stripe on 

 frontoclypeus, narrow, slightly wider posteriorly, not reaching posterior 

 angle. Dorsal stripes straight, narrow, not fused near occipital foramen; 

 light spots near setae 9 and 17 small, indistinct; indistinct light dots on 

 both sides of coronal suture; posterior end of lateral stripes curved 

 slightly ventrally, groups of indistinct dots ventrally on each side near 

 occipital margin. Setae slightly lighter than in Phryganea but similar 

 in form and arrangement. 



Labrum (Figure 75) yellow, reddish anteriorly, tuberculate near median 

 pit; anterior margin rugose, with depressions at the site of setae; setae 

 1, 2, and 4 light, spiniform; seta 1 situated on each side of median depression, 

 near margin; seta 2 short, thick; seta 4 near median indentation thick at 

 the base, curved, thin at the end; setae 3 and 5 situated laterally one behind 

 the other, reddish brown; seta 6 slightly larger, situated behind seta 4; 

 all 3 setae slightly blunt, without thin end. Median pit small, situated behind 

 seta 6; posterior -angle sclerites reddish yellow. 



Mandibles (Figure 76) oblong; distal tooth prominent, larger than the 

 others; dorsal blade of left mandible with 3 teeth, basal tooth sharp, larger 

 than the others; ventral blade with 2 small teeth. Right mandible with 2 

 teeth on dorsal blade, a small tooth near the distal tooth and a large tooth; 

 ventral blade with 2 small teeth. Outer setae brownish, thin, dorsal seta 

 slightly longer and thinner than ventral seta. 



Submentum (Figure 77) brownish, like stipes, sharply separated from 

 the membrane; setae short, brown; cardo with dark brown stripe at 

 anterior and posterior margin. Palpifer, galea, and maxillary palps dark 

 brown; galea long, almost as long as palp. Mentum wide, short, dark brown; 

 ventral sclerites, palpiger, and labial palps the same. 



Pronotum mainly reddish yellow; posterior area, separated by transverse 

 suture, only slightly dark without large dark dots; the wide dark stripe 

 characteristic for the pronotum of Phryganeidae extends diagonally across 

 the whole sclerite and not along the anterior margin (Figure 74); small 

 dots lateral to stripe in. the middle of each half of the sclerite. Chaetotaxy 

 as in Phryganea and A g rypni a, but the large anterior -margin, 

 anterior -angle, and medioanal setae shorter. 



Mesonotum small, divided by median suture, with a dark longitudinal 

 stripe in each half; this unites with the oblique stripe of pronotum and 

 lateral stripe of head into a broad dark stripe extending on each side on 

 the head and dor sally on pro- and mesonotum. Mesonotum with short 

 brown anterior -margin seta situated on yellow spot medially to the stripe. 

 Anterior -angle setae 9—10 in number, brown, situated on a round, thin, 

 yellow sclerite, with red tubercle-shaped dots at the base. Two setae longer 



The species appears in the literature also as Holostomis phalaenoides. 



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