LEriDOPTERA. 



Genus 1. APORIA, Hi)}). 



Antennae long, strongly clubbed. Wings semi-transparent, 

 white, with black nervures. 



Larva sregarious, beneath a common web. 



1. A. Cratsegi, L. — Espanse, 2^ to 2f inches. Wings 

 ample, semi-transparent, white, with black nervures and 

 margin. 



Creamy white, nervures black, margins blackish, cilia 

 hardly perceptible, males having dusky clouds at the ends of 

 the nervures of the fore wings. Female more transparent, 

 blacker nervures, and with under side of fore wings dusky 

 white, of hind wings pale yellow ; nervures in both sharply 

 black. Antennte black, tipped with yellow. 



Variation is very slight, mainly in size, and in the size and 

 intensity of the cloudy patches at the apices of the nervures. 

 The connecting nervure at the end of the discal cell sometimes 

 spreads into a blotch. End of June, July. 



Larva blackish when young, and intensely gregarious, 

 living under a white web in large families, which travel out 

 in the morning and evening to feed. When full grown, the 

 head and second segment are blackish, and the dorsal half of 

 the body nearly of the same colour, with two longitudinal 

 reddish stripes ; the under portion from above the black 

 spiracles is greyish or greenish-grey, as also are the pro-legs, 

 the legs being black. Densely clothed with short hair. 

 August to April or May. When full fed, the larv;c are said 

 to be very sluggish, lying side by side on the twigs of the food 

 plant, eating in preference the unexpanded buds, and when 

 these are exhausted moving in company to another branch. 



Food 1'laxts, hawthorn, blackthorn, cherry, plum, and 

 fruit trees generally. Indeed, it is classed among injurious 

 insects on the Continent, on account of the damage it 

 does to orchards, but in this country it seems to have con- 



