the second outwardly edged with ochreous, and preceding the first is a series of black dots.

The full-grown caterpillar, which is green, with a yellow-edged, purplish, irregular stripe on the back, is figured on Plate [23], together with a very young example, the purplish-black eggs as laid, and the red-brown chrysalis. The cocoon from which the chrysalis was extracted was spun up on a fairly stout twig of poplar, from which some of the bark had been torn; the cocoon was formed, as regards the upper part, on the bare twig, and this was covered with gnawed wood, instead of with bark fragments, as is the lower end. The moth is figured on Plate [22], and the early stages on Plate [23].

The moth emerges in June, sometimes in July, and may occasionally be found at rest on the trunks of poplars, on which the caterpillar feeds from July to September; also on adjacent walls or palings. The cocoons are made up on the surface or in the chinks of the bark, and may be searched for, all through the winter and early spring. It is curious to note how readily these are detected after the moth has escaped, and how difficult they are to see before that event. Usually there is but one brood in the year, but in the hot summer of 1906 a male specimen emerged from a few chrysalids that I had reared from eggs laid at the end of June of that year. On the other hand, the moth has been known to remain in the chrysalis for two winters.

The species is not uncommon in some parts of the London district, and seems to occur throughout England wherever poplars abound. It does not appear to have been found in Scotland, and is scarce in Ireland. Abroad it is found in Central Europe with a northern range to Finland, southwards to Italy and Greece, and eastwards to the Altai.

Pl. 22.
1.Poplar Kitten-moth, male; 2 female.
3.Alder Kitten-moth, male.
4.Sallow Kitten-moth, male; 5 female.

Pl. 23.
1, 1a, 1b.Poplar Kitten: eggs, caterpillar and chrysalis.
2, 2a.Sallow Kitten: eggs and caterpillars.

The Sallow Kitten (Cerura furcula).