We select this common moth as a representative of the small family Nolidæ, which contains only five British species. These are all small insects. They are nocturnal in their habits, and may be found at rest on the trunks of trees during the daytime. The caterpillars are hairy, and undergo their metamorphoses within silken cocoons.
The fore wings of Cucullatella are pearly grey, with a dark patch at the base, a triangular spot on the middle of the costal margin, and wavy lines beyond this, parallel with the hind margin. The hind wings are grey, and devoid of any markings.
The caterpillar is of a brownish colour, with a line of lighter patches down the back, and it is covered with little tufts of hair. It feeds on the blackthorn (Prunus spinosa), whitethorn (Cratægus oxyacantha), and also on plum trees in our gardens during the month of May. The moth is on the wing during June and July.
Family—Lithosiidæ
The Muslin Moth (Nudaria mundana)
The family Lithosiidæ contains several small moths, distinguished from the other Bombyces by the narrowness of their fore wings. When the insects are at rest, all the wings are wrapped closely round the body. They fly at dusk on summer evenings, but may be obtained during the daytime by beating the boughs of trees. If an open net be held under the boughs during this operation, the moths will generally feign death and allow themselves to fall into it when they are disturbed.
Most of the larvæ of this family feed on the lichens that cover walls and the bark of trees, and they conceal themselves so artfully among this peculiar vegetation that it is no easy matter to search them out; probably many still remain unknown to entomologists.