THE CANADIAN ENTOMOLOGIST. 203 



Towards the smaller end of this yellow spot is a short black bar. The 

 sides of the body are also ornamented with rows of violet spots, two 

 upon segment 4, and four upon 5, 8, 9, 10 and 11, and two upon 12. 

 On segments 6 to i r there is one small spot below each spiracle. These 

 spots are more distinct upon some specimens than upon others. 



After the fourth or last moult the colour is invariably velvety green, 

 paler beneath, the saddle-shaped mark has disappeared and the yellow 

 marks are all more conspicuous. The full-grown caterpillar is shown at 

 figure 10, and is a formidable looking creature. For two days before it 

 suspends itself to change to the chrysalis, it gradually assumes a purplish 

 brown tint, and the violet spots become more distinct than they were 

 before. The full-grown larva is about one inch and a-half in length when 

 walking. When at rest it is 

 shorter and thicker, the head is 

 drawn in out of sight and the 

 body assumes a wedge shape, >*«*^ 

 large in front, tapering rapidly 

 to the last segment. When in 

 this position the yellow spots '"""' '°' 



on segment 4 have the appearance of two large open eyes. This appearance 

 may possibly act as a protection from some of its enemies. When ready 

 to turn to a chrysalis, it leaves its food-plant and seeks some place to 

 pupate. It suspends itself to a silken mat and supports its body by 

 means of a silken girdle around the middle. It changes to a chrysalis 

 the second day after suspension. The newly formed chrysaHs is very 

 beautiful, being mottled with green, dove colour, black, and white, the 

 two eye-like spots on segment 4 being very distinct. After a few hours, 

 however, the green nearly all fades out and the chrysalis darkens to the 

 tint of dead wood. In all parts of Canada there is only one brood of this 

 butterfly. The eggs are laid in June and July and the caterpillars pupate 

 late in the summer and go through the winter in the chrysalis state. The 

 habits of the caterpillar are sluggish. From the first they spin a mat of 

 silk to rest upon when not eating and sally out to feed. When very 

 young they eat into the edge of the leaf upon which they hatch ; but as 

 they grow larger they crawl away to other leaves near at hand, and 

 return again to rest upon the same leaf, all the time there is food at a 

 convenient distance ; when this is all consumed they n:iove off to a fresh 



