10 



Family 2. - PIERID^E 



Genus 1. APORIA 



A. Orataegi. 



TIMES OF APPEARANCE. May and June. 



HABITAT. Common. 



OVUM. In clusters on the food-plant, in June. 



The young larvae hatch in a period varying from 

 ten to fourteen days. 



LARVA. Feeds in company on Crataegus oxyacantha 

 (Hawthorn), Sloe, Cherry, and many other fruit trees. 



PUPA. Much resembles that of P. Brassicae, but 

 is yellow, and the black spots are larger and more 

 clearly defined. I found a chrysalis of this butterfly 

 at Saint-Martin, by the road-side, on a dry stem of 

 grass, June 12 th 1891. The imago emerged eleven 

 days later. 



Genus 2. PIERIS 



P*. Brassicae. 



TIMES OF APPEARANCE. April to September, and 

 sometimes later. 



HABITAT. Generally distributed. 



OVUM. - < The eggs are laid in May, and again in 

 July, sometimes singly and sometimes in little 

 Clusters, varying in number from four or five to a 

 dozen Jn shape they somewhat resemble a champagne 

 bottle which has had the upper part of its neck 



kn , cked off The attachment is by the base 



nly, and the egg stands erect like a ninepin ; it has 



