76 THE ENTOMOLOGIST. 



distinct basal spots on each fore wing; and others have an extra 

 ocellus on inner margin of. hind wing. Several of the confluent 

 spot aberrations are similar to that of corydon, PI. I., fig. 6 ; 

 others have the initial spot of basal and central series on hind 

 wings united. 



Most of the Scotch and Irish specimens and two from 

 Ventnor have clear discoidal spots on hind wings, and in one 

 Scotch example the discoidal spot of fore wings is also white. 

 The white streak on the hind wings sometimes extends almost 

 to the discoidal cell, as in the Scotch female example figured, 

 PL II., fig. 7 ; and in two Ventnor specimens this streak joins the 

 second basal ocellus. A curious feature* in connection with all 

 the Sligo icarus that I have seen, and some of the Scotch examples, 

 is that the hind margins of both fore and hind wings are much 

 paler than English examples. This is particularly noticeable in 

 one of the males from Sligo, the whole of the margins external to 

 the orange crescents being pure white. Fringes of the male are 

 white, as on the upper surface, but of the female pale grey ; and 

 the venation of both sexes is dark coloured and distinct on the 

 hind margin. In some examples this dark colour is projected 

 into the fringes {vide PI. II., fig. 7). 



English icarus varies considerably in the matter of wing 

 expansion. Thus, for instance, I have female specimens from 

 Folkestone, taken early in August, which range from 0"75 in. to 

 0"85 in. The example figured, PL II., fig. 8, but slightly exceeds 

 three-quarters of an inch, while among the Ventnor specimens 

 are males from 1"30 in. to 1*40 in. From a large number of 

 measurements I have taken of both sexes of icai'us, from various 

 parts of England, I find the average to be — male, 1*20 in.; 

 female, I'lO in. Both sexes of Irish and Scotch are uniformly 

 larger than English specimens. Some males from Sligo expand 

 1-50 in. 



In my collection are specimens of icarus and x-ay. ccerulea 

 from Thuringia and the neighbourhood of Leipzig, and typical 

 icarus and var. icarinus from two localities in Switzerland. As 

 regards the upper and under surfaces of the type in each series, 

 I can only say that although the Thuringian males are rather 

 more shaded with mauve than the Swiss examples, all are 



* Not clearly shown, I regret to find, in the figure of icarinus from Sligo, 

 PI. II., tig. 4. 



