Tibia slightly longer than tarsus, its dorsal side with sparse, small, thin, 

 light setae, of which 3 are yellowish, thicker and longer than the others; 

 primary setae indistinguishable among the secondary setae; sparse setae 

 situated in the middle of the segment anteriorly and subdorsally; a row of 

 4 long spinelike setae, which are thicker apically subventrally; 2 small 

 setae more basally; primary, subventral, posterior seta relatively long; 

 ventral comb of tibia consisting of small, light, spinelike setae; 2 light 

 primary distoventral setae. 



Tarsus narrower apically; light dorsal setae more numerous than on the 

 486 tibia; among them several thicker, yellowish setae; a row of 5 long spinelike 

 setae anteriorly and subventrally; setae of ventral comb in form of large 

 light spines; subapical spine larger than the others; margin has a short, 

 blunt spinule distally. 



Claw dark, curved, with a light basal seta adpressed to the surface. 



FIGURE 687. Hydropsyche ornatula McL. Right midleg, posterior (A), right hind 

 leg, posterior (B) 



Mid-coxa and hind coxa moderately long (Figures 686 and 687); distodorsal 

 indentation extending slightly beyond middle of segment; dorsal surface 

 convex anteriorly, slightly concave posteriorly; dorsal groove hardly marked; 



554 



