NOVEMBER, 1861. 177 



When they are full fed, a small portion of the edge of the leaf 

 is turned over and the larva weaves its cocoon within the cover 

 thus made. 



O. quadripunctella. Early in August the larva may be 

 found in the leaves of June-berry or Service-berry making 

 Lithocolletiform mines on the under surface. Towards the 

 middle of the month, it abandons its mine and feeds under a 

 turned-down portion of the leaf. The larva is dirty greenish, 

 with four black dots on the head and four on the dorsum of 

 the second segment. It weaves its cocoon, which is reddish- 

 brown, during the latter part of the month. 



CATASTEGA. 

 Habits of the Larvae. 



The insects included in this genus are not leaf-miners, 

 although they belong to the division of Micro-Lepidoptera. 

 I am not, perhaps, justified in forming a genus from the 

 characters and habits of the larvse, and would not do it, if 

 I were not convinced that the genus is undescribed. The 

 insects may not belong to the group Tineina, and if not they 

 most probably belong to the Phy cites. 



The larvge make tubes in which they live, with the grains 

 of their excrement and silk, on the underside of leaves, cover- 

 ing them with a tent or sheet of closely-woven silk, under 

 which they feed by picking out the parenchyma of the leaves. 

 They are extremely, timid, and do not begin to feed or weave 

 until after night-fall. As the tube is increased in length, the 

 silken tent is likewise advanced as it is necessary for the 

 insect to obtain new feeding-grounds. 



1. C. timidella. The tube of the larva may be found on 

 the underside of oak leaves in the latter part of August and 

 early in September. 



The larva is semi-cylindrical, wrinkled transversely, with 

 a shield on the second segment; head small, pointed. It is 



N 



