181 Insect Architecture. 



this form more securely, it is not contented, like the former 



insect, with threads fixed on the inside of the leaf; but has 



also recourse to a few cables which it weaves on the outside. 



Another species of moth, allied to the two preceding, is of 



Small green Oak-moth. (Tortrix viridana.) 



a pretty green colour, and lays its eggs upon the leaves of 

 the oak. This caterpillar folds them up in a similar manner, 

 but with this difference, that it works on the under surface 

 of the leaf, pulling the edge downwards and backwards, 

 instead of forwards and upwards. This species is very 



Nests of Oak-leaf-rolling Caterpillars, 



abundant, and may readily be found as soon as the leaves 

 expand. In June, when the perfect insect has appeared, by 



