REPORT OF THE FOREST, FISH AND CxAME COMMISSION. 525 



Cheney, quoting Lanman, states that trout which feed extensively on caddis worms 

 have red flesh and are of a golden hue, with an increased number of red spots. As 

 many as 588 caddis-worm cases have been found in the stomach of one trout. These 

 insects were very abundant at Saranac Inn, and the following notes are taken almost 

 entirely from Mr. Betten's report on this interesting group. He reared several 

 species from the egg, and found that hydras killed many of the young but were 

 unable to use them as food because of their size. He observed several species feed 

 on stone wort, Nitella, and river weed, Potamogeton, which flourished in Little Clear 

 Creek. 



A large number of adults were taken in trap 

 lanterns, and though the laying of eggs was not 

 observed, many clusters were found on the bark 

 of submerged trees, which lead to the conclusion 

 that in some cases the female goes under water 

 to deposit the eggs. The circular cluster of eggs 

 shown in figure 4 was found suspended on a sub- 



FIG. 8. EGGS OF AN UNKNOW^ 



merged twig under a log floating in deep water. The caddis fly. 



number of eggs in this cluster was estimated at 450. '^"■'^'* betten. 



Molanna cinerea Hagen. Larvae and pupse of this form were found in great 

 abundance on sand bottoms with little or no vegetation. The adults, plate 6, figure 4, 

 rest on vegetation or other support near the place of emergence. They are shown 

 in the natural resting position on plate 6, figure 5, with antennae laid flat on the sup- 

 port, the wings and the abdomen level, which causes them to be easily mistaken for 

 small snags. They were abundant from the early part of June to the latter part of 

 August. The case is a flat one covered with sand and very fine stones, plate 6, 

 figure 6, and the larva is represented at figures i and 2, plate 6. 



Polycentropiis lucidiis Hagen ? Larvae and pup^e were found in sand bottoms 

 where there was little or no vegetation and adults were commonly seen resting on 

 plants in the creek and on the side of the hatchery near the stream. This species 

 was abundant throughout the period mentioned above. The case, plate 6, figure 10, 

 is a very soft tubular one of fine sand. It is frequently branched and the caterpillar 

 occupies the enlarged portion of the tube which is composed of two distinct layers. 

 This retreat is much larger than the larva and is not portable. The caterpillar is 

 represented at plate 6, figure 7, and attention is called to the large terminal hooks 

 on the very long pro-legs. The eggs of this species are represented at figure 11, 

 plate 6. 



Hydropsyclie species (near plialerata Hagen). Plate i, figures i, 2. The larvae 



