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level of the eyes; sides parallel in their greater part. The dark figure of 

 the frontoclypeus (Figure 22 1) is brownish, rhomboidal in its posterior part; 

 it forms a short, broad median stripe with two transverse dots anteriorly; 



a heart-shaped blackish brown spot with 

 curved row of five dots, two large dots 

 on the sides and small dots in the middle 

 in the posterior angle of the sclerite. 

 Dorsal stripes reddish brown, with 

 rows of large blackish dots close to the 

 epicranial suture; these rows are broader 

 near the bifurcation of the suture; they are 

 narrower along the coronal suture; a light 

 spot at the base of seta 17; lateral stripes 

 paler than dorsal stripes, with less distinct 

 dots; the connection between the stripes 

 brownish, with light spots at the base of 

 setae 15 and 16; the stripes are divided 

 by a broad whitish wedge-shaped area 

 posterior to seta 16; head light yellow and 

 without dots ventrally; chaetotaxy as in 

 Rhyacophila s. str.; the large setae 

 reddish brown, relatively shorter than in 

 Rh. septentrionis. 



Labrum whitish yellow; the large 

 setae 2, 5 and 6 reddish yellow. Sclerites 

 of maxillolabium dark brown. 



Pronotum with a broad black posterior 

 margin which is broader in the middle of 

 each half; however, there are no brown 

 cross stripes; posterior angles long and 

 black; lateral margin of the posterior 

 part black; it has a narrow reddish brown 

 stripe in the remaining part; anterior 

 angle with a small dark brown spot with 

 3 small setae; the 2 anterior-angle setae 

 in the light depression are moderately long, 

 reddish brown, the seta between them 

 small and light. The sclerite is light 

 yellowish in the greater part of the anterior and lateral parts; a broad 

 chestnut brown figure with a small median process in the posterior part and 

 groups of indistinct dots along the suture and in the middle of each half; 

 the pale curved stripes in the anterior part with brownish dots. Large 

 surface setae, as in the group Rhyacophila s. str.; they are short and 

 reddish brown like the anterior -angle setae. 



The thoracic gills consist of a short stalk with a short dorsal branch 

 (Figure 222); filaments slightly thicker than on the abdominal gills; some 

 filaments are indistinctly divided; there are 18—21 filaments. Legs 

 yellowish, with blackish brown spots near the articulations of the trochanter, 

 femur and tibia. 



Pattern of respiratory stripes and spots on the dorsal surface of the 

 abdomen distinct, consisting of a row of light dashes near the anterior 



FIGURE 221. Rhyacophila vicaria 

 Mart. Head, thorax and abdominal segments 

 1-3, dorsal 



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