3 closely standing, thin, short, black setae. Sides of anteclypeus with 

 tubercles with numerous, strong, black setae; similar setae on dorsal surface 

 of labrum (Figure 713); except in a few small areas, primary setae 

 indistinguishable among secondary setae. 



Apex of left mandible with 2 (sometimes 3) teeth; right mandible with 3 

 teeth in addition to apical tooth (Figure 714); a group of 13 or 14 black setae 

 5 08 on ventral side, near base; a primary, short, dark seta on outer side in about 

 the middle; a 2nd smaller seta nearby, situated more ventrally. 



Wing sheaths reaching segments 4—5. Natatorial setae of mid-tarsi 

 relatively long, dense on segments 1—3, shorter and sparser on segment 4. 



Holding apparatus of abdomen (Figures 715 and 716). Presegmental 

 plates present on segments 2 — 8, postsegmental plates on segments 3 and 4. 

 Number of denticles as follows: 11:17-18; 111:23-24+56-58; IV:18-20 + 

 22-24; V:18-19; VI:15-17; VII:12-13; VIII:7-8. The presence of plates 

 on segment 2 is a specific character of H. ne vae; presegmental plates of 

 segments 3—5 with' numerous denticles, plates pectinate and larger than 

 others; postsegmental plates of segment 3 oblong, elliptical, covered with 

 anteriorly-directed needle-shaped spinules; they are broad on segment 4, 

 larger than the presegmental plates, almost touch in the middle (Figures 715 

 and 716). 



Gills with conical, flattened stalk on segments 3 — 7; their numbers as 

 follows: 111:1, IV:3, V:3, VI: 3, VII:2; gills of segment 7 small, poorly marked; 

 posterior gill on segments 4—5 broad near base, directed posteriorly, the 

 other 2 gills much shorter and thinner. 



Pleural gills of pupa larger than larval gills. Ventral gills present on 

 segments 2—6. 



507 



FIGURE 717. Hydropsyche nevae Kol. End of body of male pupa, dorsal (A) 

 and ventral (B) 



580 



