fR 



FIGURES 11— 17. Agrypnia pagetana Curt.: 



11 —double, large, hairlike and small thin spinules of 

 the lateral process of abdominal segment 1; 12 — 

 small anterior dorsal seta of abdominal segment 3; 

 13 — tergite of abdominal segment 9; 14 — claw of 

 the anal leg; 15 — dorsal process of abdominal 

 segment 1 of pupa; 16 — end of body of male pupa 

 (A), ventral appendages and penis sheath (B); 17 — 

 case of pupa (11—12 and 15—17 after Siltala). 



lakes. Adults occur in large numbers 

 zone of the European USSR in the first 



Anteclypeus with 3 setae, including 

 a longer median and shorter 

 lateral seta; labrum with 6 setae, 

 5 of them straight, long, situated 

 near the anterior angle; the 6th 

 shorter and thinner, yellow, situated 

 slightly more medially. Apex 

 of mandible narrow, almost 

 straight, blade sharp, serrated; 

 both outer setae short, situated 

 near a small tubercle. Wing 

 sheaths of male pupae reaching 

 segment 5, of female, segment 4. 

 All tarsi with natatorial setae, 

 denser on the midlegs. 



Dorsal process of abdominal 

 segment 1 large, sclerotized, bifid 

 (Figure 15). Lateral line, as 

 usual in Phryganeidae, with dense, 

 black, soft setae which are longer 

 on the posterior segments. Gills 

 of segments 2—7 arranged as in 

 the larva, but posterior pleural gill 

 without setae; anterior lateral 

 gill sometimes present on 

 segment 8. Holding apparatus 

 on segments 4— 7, number of 

 spinules: IV:2-8; V:7-ll+ 19-21; 

 Vl:6-13; V1I:8-12. 



In male pupae, anal appendages 

 wide with a pointed process 

 posteriorly (Figure 16, A), with 

 2 rounded processes ventrally 

 on each side (Figure 16, b), one 

 large and one small, corresponding 

 to the deeply forked ventral 

 appendages of the adult male 

 genitalia; penis sheath short. 



Case consists of a reed stalk 

 (Figure 17), as in the larva, with 

 sievelike covers at both ends; 

 anterior cover more distant from 

 the end than posterior cover. 



Mode of life and 

 habitats. Living on the bottom 

 among the vegetation in stagnant 

 and slowly running water. 

 Characteristic inhabitant of 

 in overgrown lakes in the central 

 half of summer. 



27 



