74 THE ENTOMOLOGIST. 



from Sligo exhibit a tendency to the hellargus coloration, but the 

 one figured is the most decided. The only other locality from 

 which I have seen similar examples is the Isle of Hoy, but these 

 are not quite so striking as the Sligo specimens, and the hellargus 

 colour is mostly confined to the inferior wings. In typical icarus 

 the hind margins of all the wings have a linear black border ; this 

 in English sjiecimens does not usually attract one's attention, but 

 in Scotch and Irish examples it is sometimes very conspicuous. 

 The nervures are generally pale shining blue, but in some speci- 

 mens they are dark coloured towards the hind margin of the 

 wings (PL II., fig. 1), and in a few instances are continued beyond 

 the marginal border into the fringes, giving to these latter a 

 slightly chequered appearance. There is no discoidal spot on 

 either fore or hind wings, but the discoidal and other ocelli of the 

 under side are often visible from above. In a few of the Sligo 

 specimens there is a distinct row of black spots on the inferior 

 wings internal to the marginal border. These are seen in fig. o, 

 PI. II., but in other examples they are large and distinct. 

 Mr. Russ informs me that specimens of male icarus with black 

 spots are of constant occurrence in his locality. 



Female. — The form of this sex most frequently met with has 

 all the wings brown, tinged with blue at their bases. On the fore 

 wings is a black discoidal spot, and a series of orange crescents 

 internal to a row of black spots on the hind margins. The hind 

 wings have a marginal row of black spots, which are bordered 

 externally with white and internally with orange. Fringes white. 

 One of the most common forms of "blue" female icarus (var. 

 carulea) obtained at Ventnor is that figured, PI. II., fig. 9. 

 Three others from the same locality are, except in size, similar 

 to the Sligo example, PI. II., fig. 11. Between these two types 

 there are among the Ventnor specimens several most interesting 

 forms. Some of these have the discoidal spot on fore wings 

 surrounded with whitish-blue, and in others the discoidal cell of 

 the inferior wings is closed witli a small black dot set in a 

 whitish-blue ring. Others, again, have a whitish-blue triangular 

 streak internal to the third and fourth orange crescents on hind 

 wings. In nearly all these specimens the orange markings of the 

 primaries are either very faint or entirely absent. Some female 

 icarus from Pitcaple, Aberdeenshire ; and others from Castletown, 

 Co. Cork, Ireland, the latter kindly sent for my inspection by 



