120 BRITISH BUTTERFLIES. 



on the under side, which is marked, on a greenish 

 ground, with clear-cut, square white spots. The male, as 

 in the last species, is distinguished by the thin blackish 

 bar placed obliquely on the front wing. The outline 

 of this species also differs somewhat from that of the 

 last, especially in the males. This difference will be 

 better understood by comparing figs. 6 and 7 on the 

 plate, than by description. 



The caterpillar is dull-green and reddish, with a 

 white collar, and spotted with white near the tail-end. 

 It feeds on leguminous plants. 



The butterfly appears in July and August, but is only 

 found in a limited number of localities, and these chiefly 

 in the southern counties ; but where found at all, it is 

 generally abundant. Among its localities are the fol- 

 lowing : Croydon ; Brighton ; Lewes ; Dover ; Lynd- 

 hurst ; Blandford ; Plymouth ; Old Sarum, Wiltshire ; 

 Barnwell and Ashton "Wolds, Northamptonshire ; Hal- 

 ton, Bucks ; Newmarket; Gogmagog Park, Cambridge ; 

 Hull; Scarborough. 



EEPUTED BEITISH SPECIES. 



ON Plate XYI. are grouped together figures of six 

 species of butterflies which are not admitted into our 

 regular British lists, on account of the extreme rarity of 

 their capture, or the fact of their not having been 

 observed at all for several years past. They are all 

 common species in various parts of the Continent, and 

 some of them will probably occur again in this country. 



PAPILIO PODALIRIUS. The SCAECE SWALLOW- 

 TAILED Butterfly (fig. 1). There is no reasonable 

 doubt that several individuals of this elegant butterfly 

 were formerly taken in various parts of the country, but 

 no captures have occurred for many years past. The 

 caterpillar, also, was more than once found in the New 

 Forest District, Hampshire. Generally a common insect 

 on the Continent. 



