This species represents the rather extensive family _Elachistidae_, the members of which have narrow and pointed wings. Many of them are adorned with beautiful metallic tints, but are generally so small that a lens is necessary to show up the splendour of their clothing. Most of the larvae are leaf miners, and are easily reared. All that is necessary is to pluck a few twigs, the leaves of which, when held up to the light, reveal the tiny larvae in their burrows, and place them in a vessel of water. They do not feed long, and it is probable that most of the larvae so treated will be ready to change before the leaves have become dry. The present species has bright yellow fore wings, with pale grey cloudings at the hind margins. It is very abundant in many parts, and flies during the month of June. [Illustration: FIG. 240.--COMPLANELLA--ENLARGED.] The larva is one of the numerous leaf miners, and is of a yellowish colour. It feeds in oak leaves during the autumn, and its presence is indicated by light blotches on the foliage. _Nepticula aurella_ The family _Nepticulidae_--the last of the _Tineae_--contains a number of little moths, including the smallest of the _Lepidoptera_. Many of them are exceedingly beautiful, being decorated with various tints of a splendid metallic lustre, but their beauty is revealed only by the use of a magnifying lens, and they are so small that very great care and patience is required to set them properly. They may be recognised by their short and thick antennae, rather large head, broad fore wings, and narrow pointed hind wings. The larvae have no true legs, but have nine pairs of very imperfectly developed claspers. They are leaf miners, and are sometimes so abundant that several may be found in a single leaf. [Illustration: FIG. 241.--AURELLA--ENLARGED.] The species we have selected has fore wings of a rich golden brown, with deep violet tips, and a broad bar of pale golden yellow beyond the middle. It may be found throughout the spring and summer. The larva excavates long irregular burrows in the leaves of the bramble. APPENDICES APPENDIX I I have previously called the reader's attention to our classified list of butterflies and moths, and have hinted at one or two of the objects for which it is inserted. It contains the scientific and popular names of all the British Butterflies, _Sphinges_, _Bombyces_, _Noctuae_, and _Geometrae_, arranged in their various families and genera; and in cases where two specific names are commonly applied to the same insect, both are given. Its chief uses to the young entomologist are to show the relation which the insects bear one to another, and to supply a guide for the proper arrangement of the specimens in his cabinet.