frontoclypeus; this band is interrupted by the light part of the frontoclypeus 

 wedged into it. Dark dots along the dorsal and lateral stripes. Area near 

 bifurcation of frontal sutures light with dark dots; brown near the occipital 

 foramen. Ventral side of head light anteriorly, grayish brown in the other 

 part, with dark dots (Figure 564, B). Labrum with setae displaced to the 

 anterior margin (Figure 565). 



Median depression of mandibles present only in the distal part. Upper 

 blade of left mandible with 2 teeth in addition to the apical tooth; lower 

 blade with 2 distinct and 1 or 2 indistinct teeth; median depression with 

 long chetoids that form two tufts; chetoids of basal tuft feathered. Outer 

 setae of mandibles situated at about /^ of its length from the base. Maxillo- 

 labium see Figure 566. 



Pronotum dark brown, darker posteriorly and laterally; each half of the 

 sclerite with indistinct dots with dark outline; anterior half of sclerite with 

 large light dots at the base of the setae (Figure 567). Propleuron as in 

 Tinodes (Figure 568). 



403 Claw of anal legs without ventral spinules. 



Pupa. Length 5.5 mm. Antennae reaching abdominal segments 6—7; 

 first antennal segment broader but not longer than the following segments, 

 with several dark setae. Labrum short and broad, with rounded anterior 

 margin; each side of labrum with 5 weak yellowish setae. Mandibles as in 

 Tinodes, hooklike, blade straight in the middle, indistinctly serrated. 

 Wing sheaths pointed. Natatorial setae dense, present on first 4 segments 

 of mid-tarsi. Claws light and weak. Presegmental plates present on 

 segments 2—8, postsegmental plates on segment 5; number of denticles as 

 follows: 11:6-8; 111:6-9; IV:7-9; V:6-7+ 12; VL12-13; VII:6-10; 

 VIII: 8— 11. Denticles on presegmental plates of segments 2—5 blunt, 

 irregularly arranged near the posterior margin; denticles on segment 6 

 pointed; denticles on segments 7—8 straight and blunt; postsegmental plates 

 of segment 5 broad. 



404 Last abdominal segment of pupa divided into 2 long lobes, with 8 black 

 stiff setae on their narrow apex; sheath of male genital appendages long; 

 sheath of penis short. 



Mode of life and habitats. Running water. 

 Distribution. West, northwest and central parts of the European 

 USSR. In addition, Central, northern and southern Europe, Iran. 



2. Lype reducta Hagen 



Hickin, 1950:71—74, Figures 1—8. 



Full-grown larva. Length 11 mm. Closely resembling larvae of the 

 preceding species (Figure 569). Head (Figure 570) slightly longer than 

 broad. Area lateral to the anterior branches of the frontal sutures, 

 periocular area and anterior part of frontoclypeus light yellow; posterior 

 part dark brown. Dorsal and lateral stripes of head and area between them 

 also dark brown, forming a broad dark band together with the dark of the 

 frontoclypeus; area near occipital foramen light yellow, with large dark 

 dots lateral to the coronal suture that are also present anteriorly in the dark 

 part. Ventral side of head without dots (Figure 572). Posterior frontal 

 setae long; middle frontal setae much shorter. Setae 7. 9, 12 and 14 dark and 

 large; setae 15 short and thin but distinct. 



453 



