432 C. H. TURNER 



Miss Alice Noyes (65) has made a careful study of the net- 

 spinning Trichoptera of Cascadilla Creek. She confirms Siltala's 

 statement that the food of Hydropsyche is both animal and 

 vegetable. In the fall and winter diatoms form the bulk of 

 their food; in the spring and summer animal food predominates. 

 The members of the family Polycentropidae have an animal 

 diet. Chimamba alterrima of the family Philopotamidae, feeds 

 exclusively on plants. She makes the following conclusions: — 

 1. Many forms construct their nets only at night; but Hydro- 

 psyche spins by either night or day. 2. Two and a half to three 

 hours is the average time required to weave a net. 3. Different 

 species build similar dwellings. 4. Unlike the orb-weaving spi- 

 ders, they do not spin preliminary construction threads. 5. 

 There is no definite order followed in spinning the threads. 

 6. The mouthparts, not the tufts of hair on the anal legs, are 

 used to remove particles from the nets. 7. Its front legs and 

 mandibles are used for seizing and holding in place until fast- 

 ened any bits that the insect intends to weave into the net. 

 8. It is never too intent on its weaving to pick up bits of food 

 that become entangled in the nets. 9. Food captured in the 

 net is dragged inward, killed and swallowed whole. 



HIBERNATION 



Houser (37) states that Conwentzia hageni hibernates in the 

 larval stage. 



Palmer (67) says all lady beetles hibernate in the adult form. 



F. E. Lillie (48) thinks that some individuals of the monarch 

 butterfly hibernate in the adult form, although she could not 

 obtain confirmatory evidence of this. Indeed, all attempts to 

 induce them to hibernate by keeping them in a cool, dark place 

 failed; but in May she found adults with unfrayed wings. 



King (47) does not say that the mite Bdella longicornis hiber- 

 nates; but he states that it constructs a web in which it appar- 

 ently spends the winter. 



Baumberger (4) reviews, at length, the literature on hibernation 

 of insects and reaches the following conclusion: — " 1. That 

 temperature is but a single factor and not necessarily the con- 

 trolling one in hibernation. 2. That hibernation is usually 

 concomitant with overfeeding and may be the result of that 

 condition or the result of accumulation of inactive substances 



