32 Lake Maxinkuckee, Physical and Biological Survey 



Caddis-worm is ready to pupate, the pupa comes out from the 

 submerged case, crawls up on some support above the water and 

 there moults, the winged adult (imago) soon flying away. Some 

 kinds, however, emerge in the water. 



The Caddis-flies do not feed and are short-lived. They lay 

 their eggs in or near the water where they hatch into Caddis- 

 worms, thus completing the life cycle. 



We find among our field notes the following: 



October 29, 1900, collected a number of leathery caddis-cases 

 at the Weedpatch. They were made of bits of shell fastened to- 

 gether. The larva sticks four legs out of the orifice and is able to 

 crawl about freely. February 11, 1901, Caddis larvae noted. June 

 10, Caddis-flies looking like small white moths, also lace flies, flut- 

 tering in the open woods, making a continuous hum through the 

 night. June 11, noticed ovipositing in the lake; water full of 

 larvae casts, especially early in the morning; Caddis-flies very 

 glaucous, looking like moths at a distance; they stay among the 

 trees in the shady woods; collected a number and observed that 

 their antennae were very long. June 12, about 4 p. m., a strong 

 southwest wind blew great myriads of Caddis-flies toward the lake ; 

 the swarm was thick and white and the appearance was that of a 

 brisk snowstorm. June 13, while passing a maple tree on Long 

 Point in the morning, an immense swarm of Caddis-flies came out 

 of it, flying with a peculiar helpless, half-falling flight. June 14 

 to 17, many Caddis-flies and midges observed. June 22, caddis- 

 flies laying in the water. October 18 to 29 (1904), Caddis cases 

 (Helicopsyche?) like small snail shells, very abundant, attached 

 to rocks and on bottom in Outlet Bay near Holbrunner's, and 

 along the east side of Long Point. Also a number of empty chim- 

 ney-shaped cases were seen, and several flattish ones moving about 

 making burrows in the sandy bottom near Holbrunner's. October 

 5 and 10, many fine examples of Helicopsyche on stones, etc., in 

 shallow water near shore. July 27, collected three of a scute-like 

 kind while screening sand ; put them in a saucer of water but they 

 soon died. One species of Caddis-fly was abundant, a frail, glauc- 

 ous, moth-like insect, the leathery cases of which were abundant 

 on the stems of Potamogeton, Scirpus, etc., from midsummer until 

 in the spring when (about June 10) they emerge in great num- 

 bers, and the next day are busy ovipositing. A peculiar case look- 

 ing like a snail shell built of pebbles was found in numbers in the 

 same place. 



The caddis-cases that attracted the most interest were the flat 



