On the chalk downs and cliffs the butterfly has the under side of its hind wings so admirably agreeing in colour and marking with the soil, etc., that although one may watch it settle a few yards ahead, it is not to be seen when one reaches the spot. Whilst we are intent on the search the insect starts up, flies a short distance, and there repeats the disappearing butterfly trick. The same remarks apply to those Graylings that affect peaty or sandy heaths, etc. When the butterfly alights on the ground--and it rarely gets on the wing unless disturbed--it immediately closes its wings, and then allows them to fall more or less on one side, so that the whole of one hind wing is presented to view. It is said to have a fancy for the resinous sap that oozes from pine trees, and has also been observed to visit the trunks that have been "sugared." Abroad, it is found commonly throughout the temperate parts of Europe, North Africa, and Northern and Western Asia. The Speckled Wood (_Pararge egeria_). Quite early in the eighteenth century Petiver met with the butterfly shown on Plate 80 at Enfield, so he figured it as the "Enfield Eye" in that curious old book entitled "Papiliorium Britanniæ Icones." Later on, Wilkes named the butterfly the "Wood Argus," thus indicating its favourite haunts, as well as a prominent character in its ornamentation. Harris changed the name to the "Speckled Wood Butterfly," which seems even more suitable. The general colour is blackish-brown, and the spots are yellowish. The fore wings have one white-pupilled black eye spot towards their tips, and the hind wings have three such eye spots on the outer area. The male has a long oblique patch of blackish scales on the middle of the fore wings, which is, perhaps, more easily detected if the insect is held up to the light. The female is usually slightly larger than the male, the wings rather rounder, and the yellowish spots, are, as a rule, distinctly larger. The typical or southern form of this butterfly has the spots of a tawny colour, but it does not occur in Britain. Our form, in all its modifications, belongs to _egerides_, Staudinger. Occasionally, in the south of England, specimens are found in which the spots are tinged with fulvous; others have almost white spots. The spots are sometimes much reduced in size in the male, or greatly enlarged in the female. The egg is pale greenish, finely reticulated; as the caterpillar matures within, the shell becomes less glossy than at first, and the upper part is blackish.