INSECT ARCHITECTURE. 



181 



a li a n i 



resuming 



middle, nexl to the midrib, where it in ;i little 



cavity. While all this i- £ on her consorl stands near 



lis and she occasionally runs to him t<> receive his care 



her work. These rolls remain on the 

 i bushes sometime 



era! days, but probably 

 drop by the time the larva 

 escapes from the egg; and 

 ems probable that the 

 grub use- the roll for ;i 

 shelter until it matures 

 and is ready to enter on 

 its transformations to a 

 beetle. Another sp< 

 found mi the oak does 

 not devote the whole leaf 

 to a roll, for three 



/.' 



Pig. 230.— .-1, willow-leaves rolled by a caterpillar; B, willow-Ieai 



in Bectton. 



or four small rolls may be found on one leaf. 



The gall-makers are not the species of < . but 



also certain gnats and Aphides, including I sera, 



which inhabit shelters, due to the morbid g >wth and mul- 

 tiplication of cells on the leaves and twigs, • the 



