64 BRITISH BUTTERFLIES 
fore legs, in both sexes, are so extremely minute as not to be visible amongst the hairs upon the breast ; those of 
the female are still more minute than those of the male, but shorter and thicker in proportion to their size; they 
are alike clothed with scales, and the tarsal portion is not articulated. 
The larve have the body slightly thickened in the middle, cylindric, attenuated to the tail, which is forked. 
The chrysalis is destitute of tubercles. 
The perfect insects are found in grassy places in woods. 
This genus is exclusively composed of the species (numerous on the Continent, but of which only one has 
been found in England) which have the ground-colour of the wings white, marked with black spots; hence they 
are called by the French Leucomélaniens, White Satyrs and Semi-devils. They constitute the group Graminicoles 
of Duponchel. M. Lefebvre has published a valuable memoir on this group in the first volume of the Annals of 
the Entomological Society of France. 

SPECIES 1.—ARGE GALATHEA. THE MARBLED WHITE, OR MARMORESS. 
Plate xvii. fig. 1—6. 
Synonymes. — Papilio Galathea, Linneus, Haworth. Lewin Hipparchia Galathea, Leach, Stephens, Curtis, Duncan Brit. 
Papil. pl. 28. Donovan Brit. Ins. vol. viii. pl. 258. Wilkes, pl. | Butt. pl. 23, fig. 1. 
100, Hfarris Aurelian, pl. 11, fig. g—k. Arge Galathea, Boisduval, Hiibner. 
Satyrus Galathea, Latreille, Duponchel. 
This singularly-marked butterfly, which from the contrasts of its colours was called the ‘ half-mourner” by 
our early aurelians, varices in the expanse of its wings from 2 to 2+ inches. Its colours, which are yellowish 
white and almost black, are distributed in nearly equal proportions over the wings. The ground colour on the upper 
side is almost black, with one large whitish oval spot near the base of the costa, succeeded by four long whitish 
patches, the two middle ones being nearest the apex of the wings and smaller than the others ; between these and the 
apex are two smaller white spots, and there is a row of white submarginal spots. The hind wings have a large 
oval whitish spot near the base, succeeded by a very broad bar of the same colour, and with a row of sub- 
marginal white crescents varying in size. 
The markings on the under surface of the wings are nearly similar, except that the blackish markings are much 
paler, especially in the hind wings, where they are irrorated with buff. Moreover, the fore wings have a small 
black eye, with a white centre near the tip; and the posterior wings have five eyes placed just above the white 
submarginal crescents (the third crescent from the outer angle of the wings not having an eye), and the eye 
nearest the anal angle being doubled. 
The female differs in being of a larger size and in having the under surface of the wings of a yellower hue 
than in the males. Some specimens in the British Museum are so strongly characterised in this respect, that 
I at first thought it probable they constituted a distinct species. Varieties of this species are described both 
accidental and apparently permanent. Of the former, one of the most singular is represented in our pl. 17, 
fig. 5, 6, from a specimen taken near Dover, and kindly communicated to us by the Rev. W. T. Bree, who has 
published a notice of it in Loudon’s Magazine of Natural History, vol. v. p. 335. A similar variety is also 
figured by Ernst, Pap. d'Europe, 1, pl. 30, fig. G0. The black marks in this variety are very greatly suffused 
over the largest portion of the wings. An apparently permanent variety, with pale yellowish brown markings 
in lieu of the black ones, is described by Stephens. The Arge Procida of Herbst is esteemed by Boisduval also 
