are long and 4 short. Mandibles sickle -shaped, blunt, less strongly curved 

 than in Plectrocnemia; outer setae short. Wing sheaths pointed, 

 reaching abdominal segments 4 — 5j natatorial setae of tarsi of forelegs 

 sparse, those of midlegs dense; those of hind legs well developed. Plates 

 of holding apparatus brown, present on segments 3—8 (Figure 647); number 

 of spinules as follows: 111:5; IV:4-6; V:4— 5+6— 8; VI:4— 6; VII:5; VIII: 5. 

 Gills consisting of 2 filaments on segments 2—7. Anal lobes short, with 

 numerous black setae (Figure 64 8). 



Pupae lying in a case of loose tissue covered with detritus or fragments 

 of plants; membrane at end of case with coarse -meshed filtering sieves 

 (Figure 649). 



(447; 



FIGURE 646. Holocentropus picicornis Steph. Claw of anal leg, outer view (A), inner 

 view (B) 



(&h 



# 



6tf 



FIGURES 647-649. Holocentropus picic or nis Steph. Pupa: 



647 - plates of holding apparatus of segments 5 and 6; 648 - anal appendages; 

 649 - opening in membrane of case (648 and 649 - after Thienemann). 



507 



