Canadian Butterflies. 313 



base of the membraneous ones is a row of seven blue dots. It 

 feeds on sassafras, (^Laurus sassafras) and Mr. Beadle lias observed 

 it on spice wood, [Laurus benzoin). It also feeds on many other 

 species of Laurel. 



The chrysalis is a little gibbous, of a pale ferruginous colours 

 with stripes of a darker tint. 



The larvae which are found in autumn change to pupae before 

 the winter, and produce the imago at the beginning of the fol- 

 lowing summer ; the others are hatched from the end of May all 

 through the month of June and beginning of July. 



This fine butterfly is very easily caught. It generally flies 

 around the laurels, and loves to bask on the fragrant blossoms. It 

 is common in Georgia and Virginia, and is found in the island of 

 Jamaica. It is included in Dr. Harris' List of Lepidoptera inha- 

 biting Massachusetts, and as before mentioned we have received 

 it from St. Catherines, Canada West. 



We now come to the second division of the Papilionidse. 



Sub-Family II. Pieridi. 



Anal edge of the hind wings not concave, but grooved or formed 

 into a gutter to receive the abdomen ; the anterior tibiae do not 

 possess a spur in the middle, and the tarsal ungues are one or two 

 dentate. 



The caterpillers are not furnished with a nuchal fork. They 

 are slightly pubescent, and rather slender at each end of the body. 



It contains many genera, of which we believe only two occur 

 in Canada, viz : colias and pieris. We do not know whether any 

 species of the beautiful genera, ajjoria, xanthidia, gonepteryx and 

 callidryas, which inhabit the Southern and middle, and the 

 Southern parts of the Northern States, are to be met with any 

 where in Canada, but we hope to learn that we may include some 

 of them in our fauna. 



Genus I. Colias. 



Palpi short, much compressed, fringed with short and close 

 hairs, the last joint much shorter than the preceding ; antennae 

 straight, short, terminated by an obtuse gradually formed club 



By some authors Gonepteryx and Colias are separated into a third 

 sub-family called Rhodoceridi, but for the sake of simplicity we have 

 adhered to the more general arrangement which includes them amongst 

 the Pieridi. 



K 



