Lake Maxink^ickee, Physical and Biological Survey 31 



Among the more common, homely bugs, the most abundant 

 species was Oncopeltus fasciatus Dall, on the milkweed blossoms. 



Cicadas, or harvest flies, were conspicuous by their absence. 

 Throughout Indiana, as in other parts of the country, one of the 

 characteristic sounds of summer is that of the Dog-day Locust or 

 Harvest Fly. We have no record of hearing it at the lake. It is 

 possible that it does not like the sandy soil. 



An odd-shaped tree hopper, Enchenopa binotata, was noted in 

 abundance laying white eggs in masses on twigs of the hop tree, 

 Ptelea trifoliata, August 10, 1906, and examples were collected. 



Plant lice were abundant on the pondweed leaves (Potamogeton 

 natans) in Lost Lake, making a messy looking mass. They were 

 also present, but in fewer numbers, on the water-lily leaves. 



ORDER TRICHOPTERA 



The Caddis-flies 



The Caddis-flies are among the most interesting of our insects. 

 Although about 150 species have been described from America, 

 there are doubtless many remaining undescribed. 



The adults are not well known to the general public, in spite 

 of the fact that at times they appear in myriads. The larvae, 

 which are aquatic, are much better known. Every one who has 

 spent any time along mountain streams, or even about other 

 streams, or lakes, if at all observing, can not fail to have noticed 

 the cleverly built, often beautiful, cases which these larvae build 

 of sand, brightly colored pebbles or bits of wood, held together by 

 silken threads. As Professor Kellogg has well said : 



There is a great variety in the materials used and in the size and shape 

 of the cases, each kind of Caddis-worm having a particular and constant style 

 of housebuilding. Grains of sand may be fastened together to form tiny, 

 smooth- walled, symmetrical cornucopias, or small stones to form larger, rough- 

 walled, irregular cylinders. Small bits of twigs or pine-needles may be used; 

 and these chips may be laid longitudinally or transversely and with projecting 

 ends. Small snail shells or bits of leaves and grass serve for building mate- 

 rials. One kind of Caddis-worm makes a small, coiled case which so much 

 resembles a snail shell that it has actually been described as a shell by con- 

 chologists. * * * ^j^ English student removed a Caddis-worm from its 

 case, and provided it with small bits of clear mica, hoping it would build a 

 case of transparent walls. This it really did, and inside its glass house the 

 behavior of the Caddis-worm at home was observed. 



Most Caddis-worm cases are free and can be carried about by 

 the worm as it wishes, but many of them are fastened to rocks, 

 stones or other objects in the bottom of the stream or lake. When a 



