1905.] 131 



Not one shows the extension towards tlie anal angle descvibed by Milliere, yet 

 though I hardly like to suggest it, I think one or two of my specimens are the var 

 he describes, but the extension is basal, giving the spot however almost exactly the 

 form he figures. The variations in this direction are (1), a slight line basewards 

 from the spot for about 1 mm., wilh a slight dotted shade above it. (2), the same 

 line reaching quite 2 mm. (3), the line wanting, but the spot shading inwards and 

 upwards to the upper dotted shade, making a comma-shaped mark. (4), the 

 upper sliade as a separate spot rather larger than the typical one. The actual 

 position of the spot is at the end of the cell at bases of veins 3, 4, and 5. 



I find nothing that corresponds well with the slight smokiness of the wing 

 base, but there are only two specimens tlnit have been fully described, when the 

 ground colour and the spot have been dealt with. I think the dark scales forming 

 the further markings belong to a tendency to dai'kening that finds full expression in 

 the leaden variety. Practically every specimen is slightly different from its neigh- 

 bour. The commonest marking is a row of dark dots along the inner margin, 

 most commonly five or six of these towards the anal angle, one specimen shows 

 ten reaching two-thirds of the way from anal angle to wing base, another several 

 more, but some of them have only a scale or two. I note these in twenty speci- 

 mens. Another set of dark scales form dark shades in the interneural spaces, 

 beyond the discal spot, in fourteen specimens, and in several they extend also 

 basally in slighter fashion. Under a lens the scales forming these dark shades have 

 a rich purple colour. In one specimen this shading involves the whole wing except 

 the nervures, but (he dark scales being intermixed with yellow, it is still definitely a 

 pale specimen. Another dark mark is in the fringe. The fringe has a row of short 

 basal scales with larger beyond. This basal set of scales are dark from the apex 

 downwards, to nearly half-way to the anal angle, in one case nearly reaching the 

 anal angle — this line occurs in eight specimens. The dark purplish line with the 

 yellow fringe beyond is very effective. Tliere is some sexual dimorphism, the males 

 presenting a larger proportion of orange, the females of straw coloured specimens. 



The dark specimens (22 in number) are apparently the same as a specimen (the 

 only one so far apparently noted), taken by Lord Walsingham at Gibraltar, and 

 named by him (in MSS.) marginata, without definitely giving it specific rank. In 

 these the whole disc of the upper wing is of a leaden colour, as polished and 

 brilliantly shining however as the pale ones. The hind-wings are also much 

 darker than in the yellow ones. Nearly all specimens have the head and thorax 

 yellow, a varying amount of yellow shade along the costa, fringes of the hind 

 margin yellow, and a portion of the base and inner margin yellow, where it touches 

 the dorsal thoracic yellow, when the wings are closed. There is some variation in 

 the extent and brilliancy of the yellow. In two or three specimens there is a 

 distinct suffusion of yellow scales over the whole wing, traceable but much slighter 

 in a few others. The dark fringe line noted as occurring in the pale form, is 

 present in nearly all specimens, separated from the leaden colour of the wing disc 

 by a narrow yellow line. This yellow line often fails towards the apex, the dark 

 line reaches the anal angle not infrequently, but often fails to get so far. No speci- 

 men fails to show this colouring of the fringe of the hind margin, which makes three 

 lines — a narrow yellow, a narrow dark, and a broader yellow, but in a few the 

 yellow lines are obscured by having a darker coloration, but in no case do they 



