Only four species occur in our islands. Three of these have green fore wings and pale grey or whitish hind wings. The other species, _Sarrothripa revayana_, has the fore wings of various shades of grey, brown, or blackish; its boat-shaped cocoon is very like a small edition of that of _Hylophila bicolorana_, and, although the caterpillar is in some respects not very dissimilar to those of the green-winged species, the moth does not seem quite to be one of their set. THE CREAM-BORDERED GREEN PEA (_Earias chlorana_). In size, colour of the fore wings, and general appearance this moth might be mistaken for the much more common Green Tortrix (_Tortrix viridana_). On examination however, it will be seen to have white hind wings, whilst those of the _Tortrix_ are grey. Again, the head, front of thorax, and front edge of the fore wings are white in the present species (Plate 73). The caterpillar is green, inclining to whitish on the back, the latter lined with brownish, and bearing warts on rings six and eleven. It feeds in July and August on the terminal leaves of osier and willow; these leaves are drawn together with silk, and the solid appearance of the foliage at the end of the twig will afford a clue to the probable whereabouts of the caterpillar when one is searching for it. Chrysalis, brown, darker on the back, paler on the under parts, and on the wing covers; enclosed in a tough boat-shaped cocoon which is often constructed on the bark of a twig or stem of the food plant. As a rule the moth does not emerge until the following year, but in some years a few will appear in the autumn, and others remain in the chrysalis until the following May or June. This species inhabits damp places where there are osiers, {145} and it is especially common in the fens. It occurs in most of the southern and eastern counties of England, but does not seem to be recorded from other parts of the British Isles. GREEN SILVER LINES (_Hylophila prasinana_). The bright green fore wings are crossed by two shaded silvery lines, and a narrow silvery band, the latter running from the tip of the wing to the inner margin, and usually there is a whitish shade between the two lines; the fringes are reddish, or pinkish, and the front and inner margins are tinged with the same colour, sometimes strongly so on the inner margin. The hind wings of the male are whitish, tinged with yellowish green; fringes white, more or less tinted with reddish; in the female the hind wings are entirely silky white. Antennæ reddish (Plate 73). Caterpillar, green, with yellowish dots, lines on the back, and edging to first ring of the body; the anal claspers are marked above with red. It feeds in August and September on the leaves of oak, birch, beech and nut (Plate 72).