The caterpillar is of a dull pale greenish colour, with numerous black speckles; three whitish lines on the back, the central one greenish tinged and broader than the others, which are interrupted on each ring by a yellow spot; between the lines is a series of black dots, one on the outer edge of each ring; hairs, from greenish warts, white and short; head, black, dotted with white. It feeds on bird's-foot trefoil (_Lotus corniculatus_), and other trefoils and clovers: August to May. Sometimes the caterpillars do not complete growth until they have passed two winters in hibernation. The cocoon, which is yellow or yellowish white, has been found on a grass stem, but {337} it is generally placed so low down among herbage that it seems to be rarely detected. The moth is out in June and early July. As previously stated the only part of Britain that the species inhabits is the New Forest, Hampshire. Here it was first met with in Stubby Copse, about 1869, but was apparently not distinguished from _Z. trifolii_ until 1872. It is now less frequent in its old haunt than formerly, although it still occurs there; in other spots around, I believe, it is not uncommon in some years. Some authorities refer this species to _viciae_, Schranck. FIVE-SPOT BURNET (_Zygaena trifolii_). Four specimens of this species are portrayed on Plate 146. In the typical form (Figs. 7 [male], 8 [female]) the central pair of crimson spots are united and often form a large blotch; ab. _orobi_, Hubner (Figs. 6 [male], 9 [female]), has the spots placed well apart. Other more or less frequent aberrations are depicted by Mr. Horace Knight on Plate 148 where Fig. 2 represents ab. _glycirrhizae_, Hubner (spots 3, 4, and 5 united); Fig. 3, ab. _basalis_, Selys (spots 3 and 4 united with the basal pair); and Fig. 4, ab. _minoides_, Selys (all the spots united, forming an irregular patch). An extreme development of the last-mentioned form has been named ab. _extrema_, Tutt (see _Entom._ xxix., p. 341, Fig. 2). Specimens with a sixth spot as in _Z. filipendulae_ have been occasionally recorded, and an example with the lower spot of the central pair absent has been taken in West Sussex by Mr. W. M. Christy, who has also obtained a number of specimens of a yellow form (ab. _lutescens_, Cockerell) in the same locality. The yellow form is shown on Plate 148, Fig. 5. Some of the yellow aberrations also exhibit variation in the spots pretty much as in the ordinary form. In some localities, especially marshy ones, the spots on {338} the fore wings and the hind wings are occasionally dull orange; and I have noted specimens in the Weybridge district, Surrey, with the spots on the fore wings of a pinky ochreous colour, whilst the hind wings were of the usual crimson. Such "aberrations" as those last mentioned probably result from weather exposure. In 1899, Mr. G. B. Corbin recorded the capture, near Ringwood, Hants, of a specimen which had the spots on the