0 
AND THEIR TRANSFORMATIONS. 63 
addition to his characters, the eyes hairy, and his Dumicoles, additionally distinguished by the glabrous larvee 
and very Jong terminal joint of the palpi. I thus leave together all the species which have the anal vein of the 
fore wings not swollen, the mediastinal and median alone being more or less dilated. This group will, therefore, 
correspond with Mr. Stephens’ section B., after the removal of Galathea. 
These groups are further confirmed by the variations in the structure of the fore fect in the different sexes ; a 
character which has been neglected by all previous authors, except Mr. Curtis, who, without noticing the 
variations or even the sexual distinctions in this part, merely describes the fore tarsi of the genus as four-jointed ; 
while Zetterstedt states that the males have the fore legs pilose, and the females almost naked, without mentioning 
the difference in the number of their joints or in their formation. 
DESCRIPTION OF PLATE XVII. 
Insects.—Fig. 1. Arge Galathea (the Marbled White Butterfly). 2. Showing the under side. 3. The Caterpillar. 
4. The Chrysalis. 
Fig. 5. A dark variety of H. Galathea. 6. Showing the under side. 
2 Fig. 7. Lasiommata /®geria (the Speckled Wood Butterfly). 8. Showing the under side. 9. The Caterpillar. 
10. The Chrysalis. 
Fig. 1, Arge Galathea, from an English specimen in Mr. Westwood’s cabinet, is exactly identical with several which I took in Italy, 
in the neighbourhood of Civita Vecchia; and yet the varieties found on the Continent (by many considered distinct species) are almost 
numberless. The present it would seem, however, is the type of the species, as it is by far most abundant and constant. In England the species 
does not seem so prone to variation, but several varieties have nevertheless occurred ; one of the most remarkable of which is the dark one, No. 
5 and 6 of this Plate, first figured and described by the Rey. W. T. Bree in the Magazine of Natural History. The dark markings of this 
handsome species are generally described as black, but they are infact a deep rich brown. This want of exact accuracy in entomological 
descriptions exists also in other species : for instance, the dark portion of the apex of the anterior wings of Cynthia Cardui, generally described 
as black, is also a full, rich brown ; and this is not the case in pale specimens only, but on the contrary is still more evident in the most strongly 
marked individuals. This may be at once very plainly illustrated by comparing the markings in question with those of a really pure black in 
V. Urtice, or P. Machaon, or many others. The absence of accurate discrimination in describing dark colours is perhaps not of much consequence, 
and yet, as it might so easily be corrected, it appears desirable that attention should be called to it. [will mention one instance where, in 
consequence of this defect, the description might almost apply to some other insect. In the Naturalists’ Library, Entomology, vol. iii., Vanessa 
Atalanta is described as having ‘‘ the upper side of a deep black, with a deep silky gloss,’’ &c. &c. The rest of the description is accurate ; but 
that portion which makes the entire ground deep black, is quite the contrary. The fact is that the ground of the posterior wings is a fine rich 
silky brown, and the anterior wings are of the same colour from the base as far as the red band, beyond which the ground colour is intense violet, 
approaching to black, but not black. 
L. Mgeria is from a very brightly-marked specimen in the collection of Mr. Westwood, very much brighter than the individuals which I 
have been in the habit of taking on the Continent; the light markings of which, instead of being of a light, clear straw-colour, are generally of a 
dusky orange. The Caterpillars and Chrysalides are from Godart. H.N.H. 


ARGE *, Scuranx. 
ee 

This genus is distinguished by having the eyes naked ; the antenna elongated, with a long and slender spindle- 
shaped club gradually commenced ; the palpi are composed of attenuated joints, the last of which is distinctly 
pointed and naked at the tip, the under side of the preceding joints clothed with long hairs; the hind wings are 
dentated ; the mediastinal vein alone of the fore wings is vesiculous at the base, both above and beneath. The 
* Probably derived from ’Apyijs, albus, from the prevailing white colour, or else from ’Apyds, o¢iosus, from the weak flight of the insect. 
K 2 
