subventral posterior part; long, posterior, distoventral seta darker, thicker, 

 but slightly shorter, than in H. o r nat u la, reaching middle of trochanter. 

 Seta of claw of forelegs transparent, shorter than in H. ornatula. 



FIGURES 692-695. Hydropsyche a ngus tipe nnis Curt.: 



692 — posterior margin of mesonotum (A) and metanotum (B); 693 — prothoracic 

 sternite; 694 - trochantin of prothorax and coxa of left foreleg, anterior; 695 — 

 covering setae of the posterior surface of the fore coxa. 



494 Mid- and hind coxae longer than in H. ornatula; anterodorsal, spinelike 

 setae situated not only at the depression, but also further basally, reaching 

 base of segment; all setae dark brown; dorsal row at margin of depression 

 with more setae than in H. ornatula; the longest seta situated subapically. 



Mid- and hind femora relatively longer than in H. ornatula, with slightly 

 convex dorsal margin. The small, feathered setae in the subventral 

 posterior row on femur and tibia are long. 



Primary and covering setae of abdomen as in H. ornatula. Tables 17 

 and 18 give the number of pleural teat-shaped gill stalks, and the ventral 

 gill stalks of the abdomen (Table 17) and their filaments (after Siltala) 

 (Table 18). 



563 



