ISLE OF WIGHT WAVE (_Acidalia_ (_Ptychopoda_) _humiliata_). This species (Plate 45, Fig. 16) is the _osseata_ of Fabricius, but not of Haworth and other British authors. It is very similar in general appearance to the species last considered, but the wings are somewhat less ample, and rather yellower in tint. It is most readily recognised, however, by the distinctly reddish stripe on the front edge of the fore wings. Previous to 1891, when specimens were obtained by Mr. A. J. Hodges in the Isle of Wight, the species was not certainly known to be an inhabitant of the British Isles, although it seems to have been represented in many collections. The {116} insect is still found by those who know where to look for it on the sea cliffs of its island home, but so far as appears to be known at present, it does not occur in any other part of Britain. For this reason, it does not seem desirable to indicate the exact locality more definitely; but it may be added that the moth flies in July. SILKY WAVE (_Acidalia_ (_Ptychopoda_) _holosericata_). Somewhat similar to A. _interjectaria_, but tinged with pale brown, and even more glossy; the front edge of the fore wings is of the general coloration, and the only markings on the wings are darker cross lines, the third on the fore wings, and the second on the hind wings, being the most distinct. (Plate 45, Fig. 13.) The rough and rather stumpy caterpillar tapers towards the small notched head; general colour dusky reddish-brown, a pale line along the middle of the back, finely edged with black. It feeds from August to May on rock rose (_Helianthemum_), eating the withered and even mouldy leaves. Will eat knotgrass, and, no doubt, dandelion also. Here, again, we have an ancient name brought forward to supplant that which the species has borne for years, and by which it is well known to entomologists. As I am not quite certain that Hubner's (Fig. 100) _dilataria_ does represent this species, Duponchel's name is here retained. As a British insect, it has only been known since 1851, when the capture of a specimen in the neighbourhood of Bristol was recorded in _The Zoologist_. Subsequently it transpired that the scene of capture was Durdham Down, Gloucestershire, and here it has been found annually, and in some plenty, among the bushes and low vegetation covering the ground in that rugged locality. Specimens have also been noted from Berkshire (Newbury), Bucks (Chalfont St. Peter), Dorset (Halstock), {117} and Norfolk (Thetford). Possibly there are other localities in England, more especially in the west, where this species may be awaiting discovery. THE SATIN WAVE (_Acidalia_ (_Ptychopoda_) _subsericeata_). The wings of this species (Plate 45, Fig. 17) are glossy whitish, with a faint greyish, or sometimes yellow greyish, tinge; the cross lines are grey, oblique and straight on the fore wings, but the outer two on the hind wings are curved or bent.