The larvae, like those of the last family, have no anal claspers, and stand, when at rest, with both ends of the body raised. They have two 'tails' projecting from the last segment. The largest of them (the Puss), and three smaller species (Kittens) that closely resemble it in habits, all construct hard cocoons to be presently described; but the larva of the Lobster Moth spins a light cocoon among the leaves of trees. They all spend the winter in the chrysalis state. _The Poplar Kitten_ (_Dicranura bifida_) Our illustration shows the arrangement of the white and grey on the wings of this moth, but the other Kittens (_Bicuspis_ and _Furcula_) so closely resemble it that it is necessary to point out a mark of distinction. It will be observed that the fore wings are crossed by a broad grey band, edged with black. This band, in the present species, is almost of the same width throughout, its interior margin being almost straight, and the exterior one slightly concave. In _Furcula_, the outer margin of the band is generally sharply bent inward just below the costa. In _Bicuspis_ the grey band varies considerably in shape, but both this and the dark blotch near the tip of the wing are more sharply defined than in the other two species. [Illustration: FIG. 131.--THE POPLAR KITTEN.] The caterpillar is green, dotted with brown, and has a brown stripe on the back. This stripe is broken on the third segment, and widens out on the eighth and thirteenth segments. It feeds on the Poplar (_Populus nigra_) and Aspen (_P. tremula_). When full grown it descends to the trunk of the tree, and constructs a very hard cocoon of a glutinous substance from its own body mingled with little pieces of the bark that it removes for the purpose. Thus made, the cocoon so closely resembles the surrounding bark that detection is very difficult. I have frequently found these cocoons on the inner surface of loose bark. This moth is widely distributed, and may be searched for in June and July. The larva feeds during August and September. _The Puss_ (_Dicranura vinula_) No written description is necessary in this case, the illustration easily serving for identification. This beautiful moth flies in May and June, and is common everywhere. [Illustration: FIG. 132.--THE PUSS MOTH.] The caterpillar is a very interesting creature. It is green, with a hump on the fourth segment, and a patch of brown from the fourth segment to the tail. This patch is very wide on the eighth segment, but tapers to a point on the thirteenth. The two horns are rather long and rough, and from each of them a very slender pink filament is protruded when the caterpillar is irritated. It constructs a cocoon very similar to that of _Bifida_, though of course larger, on the bark of the tree on which it fed, generally three or four feet from the ground. It feeds on sallows, willows, and poplars, and may be found during July and August. Family--NOTODONTIDAE