16 THE CANADIAN ENTOMOLOGIST. 



My larvse displayed much ingenuity, overcoming obstacles, and by no 

 means proceeded always in the same way. Another just past first moult, 

 descended as before to second pair, but instead of breaking the rib to let 

 tlie leaf tall, set itself to attach threads to the upper leaves to Jiohi its leaf 

 up, and then closed the edges. Doubtless it had its sufficient reasons for 

 so building. In this in.stance. the leaf stood at about 30 above horizontal, 

 in the first, the leaf had been a little below horizontal. 



A third lar\a at same stage proceeded in quite another way. It re- 

 mained on the terminal leaf, and stitched one edge of it to the near edge 

 of one of second pair; (in this plant the pairs of leaves alternate on the 

 stem, one being at right angles to the other). An hour later, it was 

 stitching the other edge of the other leaf of the second pair. After another 

 hour, it had begun to draw up the tip of its own leaf and at length got 

 this turned over and bound down, shutting itself in a sub-triangular case, 

 very different from the usual one. During the next few days I could 

 discover no trace of this larva having fed, and on the fourth day, it had 

 left its case and closed u]) a leaf by the edges, after l)iting off the stem, as 

 related in larva No. i. At the lower, or tip end as it hung, this case 

 touched the next leaf below |)erpendicularly, and was stitched to it, and 

 that day and the next the larva fed off the tip of its case, and as first as 

 eaten this wa.s drawn down to the lower leafi so that the o]»en end was 

 pretty well closed against the ingress ot any enemy. The- following day, 

 seeing no change in the eaten parts. I cut the case and found the larva 

 dead, and a cocoon of an ichneumon-fiy by its side. 



Finally, a fourth larva overcame many troubles in this wise. It was 

 placed on one of the second pairs of leaves, audit closed the edges without 

 biting the mid-rib, until it had gone one-third the length of the leaf, when 

 it returned and broke the mid-rib nnd also eat the two holes at its base. 

 We may suppose that the larval mind at first decided that the leaf would 

 come together without the rib feeing broken : and second, discovered that 

 this was a mistake, whereupon rectification was made. At all events, 

 that is what a human architect would have done. After which the larva 

 proceeded to close the rest of the leaf; — all this occupying three hours. 

 Next day I accidentally broke off this case, and pinned it to another leafi 

 The following morning the wilted case liad been deserted, and a fresh leaf 

 was being closed up. .\ day later this last case fell of itselfi but struck a 

 lower leaf, and j^resently was bound to it l)y a few threads. Three or four 

 hours later my larva had climbed another stem of the ])lant. making a 



