526 



REPORT OF THE 



and pupae of this predaceous form were found in rapid currents in Little Clear 

 Creek, and adults settled in great numbers on the hatchery windows. This insect 

 was abundant throughout the period of work. No larval case was made, but 

 strands of silk were stretched between stones lying in the rapids. The caterpillar is 

 represented at plate i, figure 3, and the pupal case at figure 4. 



FIG. g. HYDROPSYCHE SCALARIS HAGEN. 



DRAWING BY MRS. J. H. COMSTOCK. 



FIG. 10. HALESUS HOSTIS HAGEN. 



DRAWING BY MRS. COMSTOCK. 



I Halcsns species. Larvae and pupse were found in Little Clear Creek and 

 along the shore of Little Clear Lake, especially on wood-strewn bottoms. The 

 caterpillars were quite plentiful during the entire period of work, but pupae were 

 obtained during the latter part of the season, and a single specimen was bred 

 August 31. The case consists of thin pieces of wood, placed at right angles to 

 the leng-th of the case, with their ends crossed. The coarseness of the material 

 used varies, but it is uniform for each case. The eggs of this species are laid in a 

 compact cluster with abundant gelatine. A cluster of about 300 was kept until 

 the larviE hatched, and their identity was shown by the characteristic cases made. 



2 Halcsns species. Larvae and pupae were found in Little Clear Creek. The 

 pups are commonly fastened to submerged tree branches, and closely resemble 



F*^K 



