230 THE CANADIAN ENTOMOLOGIST. 



The change in these respects is nothing like so striking in Grapta as in 

 Limenitis, where the chrysalis is greatly hunched and displays a prodigious 

 mesonotum. In this case the chrysalis is at first as limp and shapeless as 

 in Grapta, but reaches its proper form in the same way ; the segments 

 contracting and the processes growing and maturing as one looks at 

 them. 



The transformation of arcJdppns presented a close resemblance, but 

 some differences. When first suspended, which it did from a 

 pad of white silk, the larva took the attitude of an oval, the 

 head brought near 12th segment; a few hours later that of figure 

 6 ; and finally of a right angle, the head continuing to droop. During 

 the last two hours there was a constant movement of the head, which 

 seemed to rub itself on the anterior legs, and several times and up to 

 within one-half hour of the change, the larva doubled itself up and brought 

 its head to the button of silk, as if greatly annoyed at something there. 

 This I noticed in both the larvae observed. finally the body was con- 

 tracted and lifted up as in Grapta, and a slight creeping movement was 

 seen, but there were no Iwitchings or twistings as in Grapta. The creep- 

 ing became stronger, advancing in waves, and the strain on the anterior 

 segments became severe, till the skin burst on the dorsal line of 2, 3 and 

 4, and the top of the head also was rent. The slit was oblique, and the 

 ventral side was covered three segments beyond the dorsal. When the 

 body was exposed on dorsum at 10 and 1 1 , the ventral side was covered at 8 

 and 9, and the skin fitted tight.sothat as the bodybent back in the movement 

 to free the tail the skin was pinched between the segments. The struggle 

 became violent, the segments all along the abdomen stretching to the 

 utmost, and then contracting forcibly, one telescoping into the next; and 

 in this the skin followed the segment, and was drawn in and held for an 

 instant. As this movement ran through the segments successively the 

 skin was pinched at one joint after another, and the chrysalis was evidently 

 rising towards the silk as described by Dr. 1 1 arris. Unfortunately I was able 

 to see the transformation in but two examples oiarchippus. In the first one, I 

 set myself to see how the whole change must have appeared to Dr. Harris, as 

 he had described it minutely. In the next one I lifted the flap of skin 

 till I saw the ligament. In so doing the whole thing unhooked from the 

 silk, and as it lay in my hand I pulled back the skin and was able to look 

 at the ligament with a lens. I also lifted the chrysalis by the skin, and 

 the ligament did not part. It did so afterwards only by a strenuous effort 



