upon and seized with its mandibles; but, the caterpillar twist- 

 ing about, it thrust its ovipositor into it, at the same time 

 held it with its legs, and then commenced eating it. It soon 

 left this caterpillar, and drove out another, proceeding in the 

 same manner until it had destroyed all. At one time, after 

 having thrust its ovipositor several times through a spot in the 

 leaf, which had been half eaten, and was very thin, without 

 the caterpillar coming out, it began gnawing the leaf; and I 

 afterwards found a caterpillar there, which had been unable 

 to move. I supplied this ichneumon with caterpillars every 

 day for a week; and it destroyed every one, partly eating 

 them. It then died; and, from the lateness of the season, I 

 was unable to follow up this interesting subject. 

 ... ." When boring, it generally proceeded in the following 

 manner :—• It elevated the abdomen, and placed the whole of 

 the ovipositor perpendicularly on the leaf, keeping it in that 

 position until it had fixed the point ; it then withdrew the 

 outer cases about the eighth of an inch, but still directing the 

 dart of the ovipositor with them, until it w r as firmly driven in ; 

 when it took them away entirely, and, all the while, moved 

 its ovipositor half round and back again (like as one would 

 use a brad-awl), the muscles in the last segment of the ab- 

 domen being actively employed. This may easily be seen 

 with a glass of an inch and a half focus, for the ichneumon is 

 not very easily disturbed. Sometimes it places its ovipositor 

 under its body, steadying it with its hinder coxae Chips]. 

 ,, " It seemed unable to capture the caterpillars when not 

 rolled in a leaf, as, whenever it approached them, they 

 dropped down. I have several times put them under a glass 

 together, with a leaf, and it never touched them until they 

 had rolled themselves up. While they were doing so, v, -beli- 

 ever it approached them they immediately retired into or 

 under the leaf; and, when they had finished, it drove them 

 put, and murdered them : for murder it certainly was, since 

 it killed sufficient to feast a hundred ichneumons. 



" This ichneumon also laid several eggs in the rolled par 

 of the leaf while in confinement; and I also found severa 

 eggs in the leaves upon the tree : but the larvae, when hatchec 

 from these eggs, would not be. able to find subsistence, as the 

 leaf- rollers began to go into the ground on the 24th of Sep- 

 tember. The eggs were little more than half a line long, and 

 about the same in circumference in the middle, and were nar- 

 rowed to a point at each end; the external part transparent, 

 the inner opaque. The ichneumon laid one on the side o ' 

 the glass after I had driven it from the leaf; the external part 

 was then ver^^* fi ° gaw fold* e ™Hiqwto j» j„o \nvAih 



