48 European Butterflies and Moths. 



marginal row of orange spots, often partly surrounded with white, on the hind-wings. Under side 

 pale grey, with the usual row of eyes, and indistinct marginal orange spots ; one basal eye in the 

 cell of the fore-wings. In the variety Steei'eni (Treitschke), from South-Eastern Europe, the male 

 has a distinct black border, and the female is brown. Very local, and seldom common in Southern 

 and Eastern Europe and Western Asia, frequenting sunny, flowery places in June and July. It 

 expands about i\ inches. 



17. P. Bory/a! (W.V.). — Male bright blue, with a narrow black border; female brown, with 

 a small discoidal spot on the fore-wings, and traces of a marginal row of orange spots on the hind- 

 wings. Fringes white, unspotted. Under side reddish-grey, with a row of eyes, which are largest 

 on the fore-wings. Fore-wings with no basal eyes, but with marginal orange spots edged inside 

 with black ones ; hind-wings with a white heart-shaped spot in the middle. Opposite to this is a 

 faint white streak, intersecting the hind margin. The marginal orange spots on the hind-wings 

 are edged outside with black ones. Expands from i to l^ inches. It is found from May to 

 August in many parts of Europe, but is local and not very common, frequenting grassy woods and 

 hills, especially on a limestone soil. It is almost absent from the plains of Northern Germany, 

 and although it has long been reputed to occur in the south of England, its occurrence in Britain 

 has not yet been fully confirmed. The larva is dark green, with a darker line on the back, and a 

 yellow streak on the sides ; between these runs a row of yellow streaks : head black. It lives on 

 the flowers of Melilotus officinalis in spring and autumn, being double-brooded. 



* 18. P. Corydon (Poda.), {Chalk-lull Blue). — Male pale blue, with rather broad black hind 

 margins ; female brown. Fringes white, distinctly spotted with black. Under side of fore-wings 

 whitish in the male, and brownish-grey in the female, with basal eyes ; hind-wings beneath brown, 

 with a whitish heart-shaped discoidal spot, and a white dash before the red marginal spots. All 

 the wings with a row of eyes, but the three first basal eyes on the hind-wings do not form with the 

 others a regular curve round the discoidal spot. Common in Southern and Central Europe on 

 chalk and limestone from May to August. It generally appears about the end of July in its 

 localities in the south of England. Expands from \\ to i\ inches. Larva green, with yellow 

 lines on the back and sides. It lives on Coronilla varia, &c., in May and June. The male and 

 the larva and pupa are figured at PI. 14, Fig. 6, a — c. 



* 19. P. Bcllargus (Rott.), Adonis (Hiibn.), {Clifden Blue). — Male sky-blue; female brown, but 

 with fewer marginal orange spots than P. Corydon. It is dusted with blue towards the base, and 

 is wholly blue in van Ccronus (Esp.). The fringes are white, spotted with black. Under side as in 

 P. Corydon, but darker in the male, and the basal eyes of the fore-wings are occasionally wanting. 

 The three first basal eyes of the hind-wings are arranged so as to form nearly a circle round 

 the discoidal spot with those of the central row. Expands from i^ to \\ inches. It is double- 

 brooded, appearing both in spring and autumn, and is very common in many parts of Europe, 

 North Africa, and Western Asia, especially on chalk or limestone. In North-Eastern and North- 

 western Europe it is much more local than in the south. The larva is green or pale brown, with a 

 darker line on the back, and a yellow line on the sides. Between these is a row of triangular 

 reddish-yellow spots ; head blackish-brown. It lives on Trifoliuin, Genista, Lotus, Hippocrepis, 

 &c., in May and June, and again in autumn. The male butterfly is figured at PI. 14, Fig. 7. 



* 20. P. Icarus (Rott.), Alexis (W. V.), {Common Blue). — Male lilac-blue, narrowly edged with 

 black ; fringes white, unspotted. The female varies from blue to brown, and has a marginal row 

 of red spots. Under side with marginal red spots, bordered with black ones, and a central row of 

 eyes. Fore-wings brownish-grey, with two basal spots, except in var. Icarinns (Scriba.). Hind- 

 wings yellowish-brown, with basal spots ; and a white dash in the centre of the hind margin. Base 



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