91 



Male : fore wings fine clear orange-brown, mottled with 

 grey, with, a small patch of white at the inner corner, a 

 black waved streak, margined on its inner side with 

 white, across towards the middle; at the centre, towards 

 the upper margin, is a black V, and beyond the middle 

 another black waved streak, the second line margined on 

 its outside w r ith whitish. Hind wings grey or pale- 

 brown, also several whitish strokes running into the outer 

 margin, and a row of three white spots at the outer 

 corner. , 



The female is paler in colour, and the V in the upper 

 wing is more distinct, but the general markings are 

 similar. 



Localities for this species are Rannoch, Bristol, Brighton, 

 Preston, Ipswich, Lower Guiting, Horsham, Worcester, 

 Monmouth, and St. Leonard's Forest. 



The perfect insect appears in the early part of April. 



The caterpillar is pale-green, with a yellow line on the 

 sides in front, ten slanting white strokes on each side of 

 the back, and the sides dotted with black and ferruginous. 



The date of the appearance of the caterpillar is in July. 



It feeds on the birch, beech, lime, hazel, &c. 



This moth flies in the day-time, and is very quick and 

 agile on the wing. 



SATURNIA CARPINI. 



EMPEROR MOTH. 

 Plate XVI. Figure 3. 



THIS noble insect measures from about two inches 

 and a quarter to a little over that width in the male, 

 and from a little under to a little over two and three 

 quarters in the female. 



