Scotland (Figs. 8 ♂, 9 ♀). The male, which has the basal area of the fore wings pale, is referable to ab. borealis, Sparre-Schneider, whilst the female is more nearly typical. In England the majority of the

specimens belong to ab. rufa, Tutt, which is reddish in the coloration of fore wing (Fig. 7). Sometimes the basal area in this colour form is pale also.

The caterpillar is green, sometimes tinged with olive and freckled with darker green; there are three dark-edged pale-green lines along the back; the under surface is tinged with yellowish, and is separated from the green colour of the upper surface by a whitish stripe, edged above with black; head, brownish, with darker freckles. It occurs in April and May, when it feeds on bramble, rose, oak, sallow, and some low-growing plants.

The moth is found in September and October throughout England, and Scotland up to Moray.

The Orange Sallow (Cirrhia (Xanthia) citrago).

The ground colour of the fore wings is generally yellow, but in some districts the specimens exhibit a tendency towards orange-red. The latter tint is very decided in var. aurantiago, Tutt. There is but little variation in marking, but the central cross line is broader in some specimens than in others. (Plate 10, Fig. 1.)

The caterpillar is dark olive-grey above, with white dots, and obscure greenish beneath; of the three whitish lines along the back, the central one is rather wider than the other two, which are edged above with black; along the region of the spiracles the colour is whitish grey. Head, brown, shining, and darker on the mouth; a black mark on ring of body next the head. (Adapted from Porritt.) It feeds on lime (Tilia vulgaris) in April and May, and conceals itself between two spun-together leaves during the daytime. In such retreats I have frequently detected them by simply standing under the branches and looking upwards and outwards from the trunk. When nearly full grown they more often descend the tree, and hide by day

among the undergrowth, etc., at the base of the trunk, whence they return to their feeding quarters by crawling up the tree at dusk.

The moth is out in August and September, and although it does not seem to care much about the collector's sugar when spread on tree trunks in the usual way, it seems to accept it freely enough when daubed on the foliage. The leaves of the lime are, however, generally well coated with a sweet substance proceeding from Aphides, and commonly known as honeydew. This in itself is very attractive to the moths. The species seems to be widely distributed over England, and will perhaps be found in most districts where limes flourish. In Wales it has occurred in Flintshire, Denbighshire, and Carnarvon. McArthur obtained a specimen in the Isle of Lewis in 1887, and Renton records it as found in Roxburghshire. Little is known of it from Ireland, but it has been noted from Wicklow and Galway.

The Barred Sallow (Ochria (Xanthia) aurago).

The ground colour of the fore wings, which in the type is pale yellow, ranges through various shades of yellow to deep orange. The basal and outer marginal bands are pale purplish, in the type, but in the more orange forms the bands are rather more reddish purple. In ab. fucata, Esper, the purplish colour of the bands spreads over the orange central area, and in ab. unicolor, Tutt, the orange invades the basal and outer marginal regions, so that the bands are pretty well obliterated, and the fore wings assume a more or less uniform orange coloration. The latter form is uncommon, but a rarer one in this country is ab. lutea, Tutt, which has the fore wings almost entirely orange-yellow. (Plate 10, Figs. 2 and 3, the latter inclining to ab. unicolor.)

The caterpillar is reddish brown with pale dots, and with

three whitish lines along the back; a pale stripe along the sides. Head, pale brown, shining. May be found from April to June on beech, or on maple where this occurs around beech woods. At first it feeds on the buds, but later on the leaves; for protection during the day it spins together two of the leaves, and so forms a suitable resting place. Sycamore, it may be mentioned, is acceptable to this caterpillar when reared in captivity.

The moth is out in September and early October, and is chiefly found in the neighbourhood of beech woods, especially those in chalky districts in Oxford and adjoining counties, Hertfordshire, Middlesex, Essex, Suffolk, Norfolk, Kent, Surrey, Sussex, Wilts, Somerset, Dorset, and Devon. It also occurs in the counties of Hereford, Worcester, and Cheshire; it has been found in Yorkshire since 1890 in several localities, including Barnsley, Doncaster, Huddersfield, and Rotherham. At least one specimen has been recorded from Pembrokeshire, and others from Flint and Denbighshire, in Wales.

The Pink-barred Sallow (Xanthia lutea (flavago)).

In some examples of this species (Plate 10, Figs. 4, 5) the oblique band of the fore wings is purplish, and in others red or reddish; the former are typical, and the latter are referable to ab. ochreago, Borkhausen. Often the band is incomplete, and sometimes it is only indicated by three more or less regular series of reddish dots (ab. togata, Esper). I have one example of this form from the Isle of Hoy, and another specimen from the same locality is somewhat similar, but the spots are not so well separated, and are purplish in colour.

The eggs (Plate 6, Fig. 3) are yellowish when laid, but become purplish later, and the ribs then appear whitish.

The caterpillar when young lives on catkins of the sallow, and when these fall it feeds on low-growing plants, but it will

eat the leaves of sallow and the seeds of wych-elm. It may be found from March to June.

The moth appears in September and October. It is widely distributed, and often common at the sugar patch, over the whole of England, Wales, Scotland up to Moray, and Ireland.

The range abroad extends to Amurland, Japan, Kamtschatka, and North America.

The Sallow (Xanthia fulvago).

A typical male and female of this species are shown on Plate 10, Figs. 7, 8; Fig. 6 on the same plate represents ab. flavescens, Esper. Sometimes the fore wings are orange-tinged, and such examples having the typical markings well defined are referable to ab. aurantia, Tutt. In cerago, Hübner, the markings are fainter than in the type, and the orange-yellow modification of this form has been named imperfecta, Tutt.

The caterpillar is brown above with a tinge of red or purple, and freckled with darker; there are three pale lines along the back, but only the central one is distinct, and this is more or less interrupted by clusters of darker freckles; there is a darker stripe composed of freckles on the sides, and below this is a pale brownish stripe; head, brown, plate on the first ring of the body