ISC,].] ?S7 



tu 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 ob- 

 tain new feeding grounds. 



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

 side 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 very dark, coucolorous 

 green, shield paler; head pale brown, varied with darker brt)wn. 



The tube is very long, cylindrical, enlarging from the beginning which 

 is a mere thread until it attains considerable thickness. The open extrem- 

 ity is covered by a web, in the middle of which is a gallery lined on each 

 side with frass, and the larva passes through it in order to feed. In feed- 

 ins: the larva leaves the outer cuticle and the net-work of veitfs entire. 



About the middle of September the larva abandons its tube to form a 

 cocoon on the surface of the ground. I have seen numbers of this larva 

 on oaks in Minnesota near Saint Paul. 



2. C. Aceriella. The larva forms a moderately long, slender, cylin- 

 drical tube at the base of the leaf of maple, A. rubrum, early in July, and 

 is covered with a thin transparent web closed in advance. The tube in- 

 creases in diameter from the beginning to the end and is placed between 

 two principal veins of the leaf, and the web is extended from one vein to 

 the other. 



3. C? Hamameliella. The larva constructs a little, short tube of 

 frass along the midrib of the leaf of Witch- Hazel, Ilamamelis Virginica, 

 during the latter part of September. The tube is begun in the angle 

 made by a vein and the midrib and the triangular space between them is 

 covered with a thin web of silk having beneath it the tube. 



The larva is nearly cylindrical, slender, with head pointed. It is of a 

 uniform, rather pale green color. 



