The moth flies throughout the summer, possibly in two generations, as, when reared in confinement, moths appear in May, and from eggs obtained from these, caterpillars feed in June and July, and attain the perfect state in August. Like the last species, its chief resting-places are the rocks, in its favourite haunts, in gorges among the hills and moorlands. It has been recorded from few parts of northern England, but one specimen is said to have been taken in Dovedale, Derbyshire. In Lancashire it has been noted as scarce about Clougha; and in Yorkshire one example was taken on Malham Moor in August, 1876, and one at Hutton Buscel Moor, near Scarborough, July 16, 1891. It is more plentiful in Scotland; in Clydesdale it is local, but not uncommon, the localities mentioned being Lochgoilhead, and watercourses above Ardentinny; more frequent in Perthshire, thence to Sutherland, and it occurs also in the Hebrides and the Orkneys. In Ireland, it is found in Co. Antrim; and Mr. Thomas Greer informs me that it is common at Murlough Bay, Fair Head. SILVER-GROUND CARPET (_Xanthorhoe montanata_). Figs. 7 and 8 on Plate 80 represent the most usual form of this species, which is variable in the amount of clouding on the fore wings and in the intensity of the cross marking. In some specimens, chiefly from southern localities, the fore wings are almost clear white, and the central band is broadly blackish (Fig. 9). Shetland specimens, on the other hand, are much clouded or suffused with ochreous brown, and the central band is greyish brown (ab. _shetlandica_, Weir (Fig. 10)). Then there is variation in the central band, which is often entire, but more frequently broken up by bandlets; or it may be considerably narrowed, especially from the middle to the inner margin, and not altogether rarely it is completely severed below the middle, and the lower part almost or quite absent. A specimen with all {194} the wings smoky leaden-grey, and the central bar of the fore wings pale grey-brown, was taken near Longfleet in Wiltshire, in the summer of 1881. The caterpillar is wrinkled, with a ridge along the sides; in colour it is pale brown, inclining to purplish with blackish dots; three lines along the back, the central one dark greyish, the others paler and broader; below the latter the sides are greyish tinted with a lower edging of pale yellowish brown. It feeds at night on bedstraw, and various low-growing herbage, including grass. August to April. The moth is out in June and July, sometimes earlier in the south. It is generally distributed, and, as a rule, common, in woodlands, lanes, etc., throughout the British Isles. GARDEN CARPET (_Xanthorhoe fluctuata_).