This greyish-brown moth has two darker, sometimes reddish, cross lines on the fore wings, and one such line on the hind wings. It is presumably only to be regarded as an accidental visitor to England. The first record was of a specimen captured in the Warren at Folkestone in July, 1866, and since that year others were obtained in the same locality, but apparently not more than about half a dozen altogether. None seems to have been recorded for over thirty-five years. The specimen, whose portrait is shown on Plate 38, Fig. 3, was obtained from Dresden. Abroad, the range includes Central and Southern Europe, Asia Minor, Syria, and Armenia. THE GRASS EMERALD (_Pseudoterpna pruinata_). When freshly emerged from the chrysalis, the species represented by Figs. 6 to 8 on Plate 38 is of a beautiful blue-green colour, but in course of time a greyish shade creeps over the wings. The dark cross lines vary in intensity; in some specimens well defined and blackish, in others very faint, and hardly discernible; occasionally, the space between the lines on the fore wings is dark shaded; the whitish submarginal line is not always present. This species is the _cythisaria_ of Schiffermiller, and the _cytisaria_ of other authors. The caterpillar (figured on Plate 41, Fig. 1, from a coloured drawing by Mr. A. Sich) is green, with three lines along the back, the central one dark green, the others whitish; a pinkish stripe low down along the sides, the points on the head and the first and last rings of the body are often pink also. It feeds on pettywhin (_Genista anglica_), also on broom (_Cytisus scoparius_) {102} and gorse (_Ulex_); in captivity it seems to thrive on laburnum. Most frequently obtained in the springtime after hibernation. The moth is to be found in June and July on moorlands and commons pretty well throughout the British Isles, but it seems not to have been noted north of Perthshire, in Scotland. Odd specimens have been known to occur in late August or early September, but this is quite exceptional. THE LARGE EMERALD (_Geometra papilionaria_). This charming green species (Plate 40, Figs. 1 and 4) varies in tint and in the distinctness of the whitish wavy cross lines. In some examples, one or other of the lines is absent, and far more rarely there is but little trace of any of these markings. Occasionally, the discal mark is preceded by a whitish wedge-shaped spot on the fore wings (ab. _cuneata_, Burrows). When newly laid the eggs are whitish, but soon change to greenish yellow, and finally to pinkish.