The caterpillar ranges in colour from greenish brown to purplish brown, and is frequently freckled with a darker shade of the general colour; there is sometimes a pale patch on rings 6 and 7, and the sides are fringed with fine bristles along the spiracle area. It feeds, from September to May, on the leaves of oak, birch, beech, elm, etc., and during the winter will nibble the bark of the younger twigs, and also eat the buds.

The moth, which is partial to the woodlands, is out in June and July, and is pretty generally distributed over the British Isles, except the Hebrides, Orkneys, and Shetlands.

Large Thorn (Ennomos autumnaria).

This fine species was first definitely ascertained to occur in Britain in 1855, but it had been reported as British at a much earlier date, and was figured by Wood in 1839. Up to 1859 it had only been recorded from the North Foreland and Margate in Kent, and from Brighton, Sussex. In 1862, a specimen was taken at Brighton and one at Deal, the latter a female. Two examples were secured at Gosport, Hampshire, in 1865, and one at Deal in 1867. Then, after an interval of ten years, three were captured in Hants (Alverstoke), and two years later a round dozen were obtained at Gosport. During the last thirty years specimens have been recorded from Margate, Deal, Dover, Folkestone, Hythe, and Ashford (1907), in Kent, from Chichester, Sussex, and from Shoeburyness, Essex (1898). It has been reared on several occasions from eggs obtained from captured females, and is still more frequently bred from eggs deposited by the descendants of wild parents.

2 Pl. 108.
1, 2.Barred Umber. 3.Barred Red (green var.).
4, 5.Barred Red. 6.Light Emerald.

2 Pl. 109.
1, 3.Large Thorn.2, 4, 5.August Thorn.

The eggs are deep olive, with a white ring at one end; and the caterpillar is brownish in colour, rather shining, and very twig-like. It feeds on birch, alder, hawthorn, sloe, plum, etc., and has been found on sycamore and cherry; May to August. The early stages are figured on Plate [106], Figs. 1, 1a. The moth (Plate [109], Figs. 1 ♂, 3 ♀), which varies in colour from pale to deep ochreous yellow, and also in the amount of purplish brown freckling, usually has the upper part of the outer marginal area some shade of tawny brown. Specimens of a greyish chocolate tint have recently been reared by Mr. Newman, of Bexley (Plate [134], Fig. 9). Most of the specimens captured in England have been obtained at light in the autumn. The range abroad extends to Amurland, Japan, and North America.