222 Canadian Butterflies. 



hind liead, and two on the front of the thorax. Antennae black, 

 and rather long. Expansion of the wings about 3 inches. 



Female. — Very similar to the male, but differs in having the 

 first band formed of smaller dots, and somet'.mes they are almost 

 obsolete on the inferior wings, whilst the blue lunules are larger 

 and more distinct. Expansion of the Avings, about 4,^ inches ; 

 but, in many specimens, there is little difference of any kind be- 

 tween the two sexes. 



The Caterpillar very much resembles that of the English P. 

 Machaon. It is of an apple green, with a transverse band upon 

 each segment, formed by alternate black and yellow spots, except 

 upon the three first, where the black band is only interrupted by 

 the yellow points towards the stigmata. Whilst upon the back 

 they are in front of the black band, and not in a line with it. 

 Besides this, there are three black dots upon the anterior part of 

 the first segment, and tw^o lines of the same colour upon the head. 

 The feet have the crown or suckers black, with a spot of the same 

 colour at the base. Like all the other larva3 of this genus, it is 

 furnished with an orange-coloured forked organ on the top of the 

 segment behind the head. The figure in Boisduval's work on the 

 North American Butterflies is not Avell coloured, and does not 

 give a good idea of it. This Larva lives on the carrot [Daitcus 

 carota^ upon fennel (anethiim feniculum,) and upon many other 

 of the Umbeliifera3. About Montreal we have frequently met 

 with it in gardens, on Parsley, and on a plant called "Everlasting 

 Celery." Emmons mentions it as being found in the month of 

 June, whilst we have observed it at the beginning of September ; 

 but there are two broods in the j'ear, the autumnal one passing 

 the winter as pupas and producing those specimens of the Butter- 

 fly which we first see in Spring. 



The Chrysalis is at first pale green, but soon changes to brown- 

 ish white, with darker markings. The summer brood or broods 

 (for Boisduval says there are three during the season) pass only 

 about a fortnight in the pupa state. This species is so very sub- 

 ject to the attacks of Parasites that out of seven pupre which we 

 kept one winter, not one produced the butterfly, but from each 

 came out a large Ichneumon, with red body and legs, and steel 

 blue wings, which made its escape by gnawing a large round hole 

 in the side of the pupa. When the chrysalides are kept in a 

 warm room through the winter, this parasite will often make its 

 appearance as early as January or February. 



