The caterpillar is long and slender, with a somewhat flattened appearance, and gradually tapered towards the notched head; the general colour of the roughened body is greyish brown, the middle ring divisions, and V-shaped marks on the back, are blackish or dark brown; there is also a double dark-brown line along the back, not always distinct. It feeds, from August to May, on a variety of low-growing plants, and is partial to withered leaves, especially those of bramble and dandelion. The moth is out in June and July, and is often common, and pretty generally distributed throughout our islands, except that it seems not to have been noted north of Moray, in Scotland. Abroad, the range extends to East Siberia and Amurland. THE SINGLE DOTTED WAVE (_Acidalia_ (_Ptychopoda_) _dimidiata_). The most noticeable feature in this whity brown moth (Plate 47, Figs. 9 and 12), sometimes known as _scutulata_, are the larger dots at the costal end of the dotted cross lines, and the blackish or dark-brown chain-like mark on the lower part of the outer marginal area of the fore wings; the latter is sometimes obscured in a cloud of its own colour. {122} Eggs (Plate 47, Fig. 1a), laid in a batch on a dried leaf of dandelion, were whitish at first, but turned reddish later. The elongated and somewhat flattened caterpillar (figured on Plate 47, Fig. 1, from a coloured drawing by Mr. Sich) is ochreous, with brown lines on the back, the central one double, and interrupted on the middle rings, upon which are oblique pale-brown dashes. It feeds, from September to April, on beaked parsley (_Anthriscus sylvestris_), burnet saxifrage (_Pimpinella_), etc., and may be reared on withered leaves of dandelion and other weeds. The moth is out in June and July, and in northern localities in August. Generally distributed, and often common. TREBLE BROWN SPOT (_Acidalia_ (_Ptychopoda_) _trigeminata_). This species (Plate 46, Figs. 8, 11) is similar to the last, but generally rather larger and somewhat paler; the front edge of the fore wings is marked with blackish or dark purplish grey, and there is a band of the same colour on the outer marginal area; the inner edge of this band is formed by the second line, and the outer edge is wavy, interrupted above the middle, and sometimes below also.