This species exhibits more variation than is usual in this group. Typically, the moth is greyish white, but in some specimens the grey is most in evidence, and in others the white. A practically black form, with white fringes, has been noted from North Cornwall, and at Eastbourne and Portland many of the specimens have a clear, bone-coloured ground, with fine but very distinct cross-markings; these seem to be referable to ab. _pastoraria_, Joannis. The cross lines in both dark and light forms are sometimes very indistinct, but occasionally the first and second of the fore wings are united, and so form an irregular dusky band; the greyish clouding on the outer marginal area is also variable. Three {126} specimens are shown on Plate 49; two from Eastbourne, Figs. 5 [female], 6 [male], and one from Essex, Fig. 7 [female]. The long caterpillar is very pale slaty-olive, with three paler lines along the back, the central one edged on each side with olive, darkest on the last three rings; spiracles black, and under surface of the body pale slate blue (adapted from Porritt). It feeds on various low-growing plants, among which, yarrow, mugwort, chickweed, cinquefoil, and knotgrass have been mentioned; also, it is said, on sallow. There are certainly two broods in the south, one feeding up in the summer, and the other hatching in September, and after hibernation attaining full growth in May or June. Moths of the first generation are on the wing in June and July, and of the second in August and September. Although sometimes found inland, the species is more especially attached to the coast, and is found in nearly all the seaboard counties of England, Wales, and Ireland. In Scotland, it occurs in Wigtownshire, and very dark specimens have been obtained on rocks in dry pastures at Ardrossan; June to end of July. THE LEWES WAVE (_Acidalia_ (_Leptomeris_) _immorata_). Although the late Mr. S. Stevens exhibited a British specimen of this species, as a curious variety of _Strenia clathrata_, at a meeting of the Entomological Society of London in 1868, it was not until the year 1887, when Mr. C. H. Morris captured two specimens in Sussex, that the insect became recognized as a native. It is probable that the earlier example, taken some years before it was shown at the meeting referred to, may have come from the same locality in the Lewes district where the later specimens were captured. Anyway, the species has, so far, not been recorded from any other part of our islands, but it continues to be found in its original haunts, described as "some heathy ground," up to the present day. (Plate 49, Fig. 9.) {127}