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THE CHALK-HILL BLUE BUTTERFLY. 



Papilio Corydon. 

 PLATE XXXIII. 



Papilio Corydon, Donovan's Brit. Insects, pi. 236. Hesperia 

 Corydon, Fabricius, Ento. Syst. iii. 



THE whole upper surface of the wings and body of 

 this butterfly are of a pale silvery blue, with a broad 

 black fringed margin ; that of the lower wings with 

 a row of central equidistant blue rings, or eye-like 

 spots. The under surface of the insect is of a grayish 

 brown, with a black margin, having a double row of 

 white spots in the centre. All the other parts of the 

 wings are ocellated. 



This is an exceedingly local British butterfly, and 

 has only been found on the Chalk Hills, between 

 Dartford and Rochester, particularly on a long range 

 of hillocks, leading from Dartford to the wood of 

 Darent-Home. This butterfly has been called the 

 Chalk-Hill Blue Butterfly. We believe it has not 

 been found in any other part near London. The 

 larva is unknown. It appears in its winged state in 

 the first and second week of July. 



VOL. I. M 



