CLIFDEN BLUE. 147 



specific name, is abundant in some seasons in the vicinity of 

 Croydon, Surrey, as Mr. C. Miller informs me: it also occurs 

 in some parts of SuiFolk, and other southern counties. It too 

 frequents the districts of the chalk formation. 



The expanse of the wings is from an inch and a quarter to 

 nearly one and a half. The fore wings are of a splendid 

 polished azure blue, the fringe white, intersected by the veins, 

 edged interiorly by an attenuated black line. The hind wings 

 are of a similar appearance. 



Underneath, the fore wings are of a dark ash grey, with 

 one eyed spot towards the base, then a large dark one near the 

 centre, then a waved row of six, and then two other faint 

 rows. The hind wings are powdered with silvery blue at the 

 base; near the front margin are three eyed spots, and below 

 these two others; the outer one near the centre with a larger 

 white circumference, and a comet-like tail pointing downwards. 

 Between these and the outer margin are two rows of eyed 

 spots, the inner one irregular, and with a white patch about 

 its middle, the outer one following the black line which meets 

 the margin, and is followed by the Avhite fringe. Between the 

 two rows are some pale orange marks with white crescents on 

 their inner edge. 



The female has the fore wings of a dark brown colour, the 

 base sometimes marked with blue. There is a white spot near 

 the centre towards the front edge, with a black speck on it. 

 The fringe is pale buiF white, chastely striated on the upper 

 portion with blackish brown, and within it is an obscure row 

 of dark dots, tipped interiorly with faint dull white. The hind 

 wings are similarly marked, but there is more blue on their 

 inner portion, and there is a row within the margin of black 

 dots, some of them set in orange, and within these a row of 

 small angular-shaped bkie specks. 



The caterpillar is described as being green, with rows of 

 fulvous spots along the back. 



This butterfly also varies in the number, size, and situation 

 of the spots on the under side, and in some specimens those 

 on the one side do not even correspond with those on the other. 



