2. Rhyacophila narvae Navas 



Lepneva, 1955:271-277, Figures 1-5. 



Full-grown larva. Length 12—14 mm. Color of head and thorax mainly 

 whitish yellow or yellow; pattern on head blackish brown (Figure 281 ); 

 eyes situated on a wide light field. Frontoclypeus dark, lighter and brownish 

 near the curvature of the frontal sutures; both sides of the anterior part 

 with 2—3 indistinct large dots; a curved row of chestnut brown dots in the 

 posterior part. Lateral anterior -margin seta lateral to the frontal suture 

 (Figure 282) light, small and slightly curved inward; intermediate seta 

 straight, short, brownish; median seta larger than the others, like the 

 anterior frontal seta, and recumbent; median frontal seta small; posterior 

 frontal seta long and dark. Dorsal stripes broad; space between them near 

 the coronal suture light; lateral stripes connected with the dorsal brownish 

 stripe near setae 15 and 16; head mainly dark ventrally. Seta 9 long and 

 brown; the short thin seta 11 is situated posterior to it; seta 7 shorter 

 than 9; seta 10 light, small, slightly curved; setae 12 and 14 long, setae 15 

 and 16 situated in the posterior part of the head, one behind the other; 

 15 longer than 16. Both ventral setae straight and spinelike; seta 18 

 slightly longer than seta 8 (as in Rh. s ib ir i c a), situated in the anterior 

 part of the head, near the bifurcation of the gular suture. 



263) 



FIGURES 281-283. Rhyacophila narvae Navas: 



281 — head and thorax, dorsal; 282 — anterior part of frontoclypeus and labrum; 

 283 — mandibles, dorsal: left mandible (A) and right mandible (B). 



281 



