the end of April to the end of May or beginning of June.

* * * * *

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THE WOOD-WHITE BUTTERFLY. (_Leucophasia Sinapis._)

(Plate V. fig. 2.)

A glance at the figure of this graceful little butterfly (on Plate V.) will
suffice to distinguish it at once, and clearly, from all our other Whites.
The most ordinary form of the insect is there represented, but there are
specimens occasionally met with that have the blackish spot at the tip of
the wings very much fainter; and sometimes, as in one that I possess, this
spot is totally wanting. The shape of the wings in these is also different,
being much rounder, and proportionately shorter, than in the ordinary
shape. This difference in outline is, I believe, a sexual distinction, the
more rounded form belonging to the female insect.

The slender, fragile wings and the attenuated body of the Wood-white give
it a look of almost ghostly lightness, and its manners befit its spectral
aspect, for it seems to _haunt_ the still and lonely wood glades, flitting
about slowly and restlessly, and being seldom seen to settle.

From its weak flight, it is a very easy insect to capture. It appears to be
addicted to early rising, _twenty-six_ specimens having been taken _one
morning before breakfast_ by a gentleman at Grange, in North Lancashire.
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The _caterpillar_ is green, striped on each side with yellow; it feeds on
the Bird's-foot Trefoil, and other leguminous plants.

The _chrysalis_ is shown on Plate I. fig. 18, and in shape somewhat
approaches that of the Orange-tip.

The _butterfly_ appears in May and August, and though by no means a common
or generally distributed insect, is found--and sometimes abundantly--in
many localities throughout the country, as far north as Carlisle; some of
these are here given. Woods in neighbourhood of Brighton, Horsham (Sussex),
Dorchester, New Forest, Exeter, Epping, West Wickham Wood, Monkswood,
Huntingdonshire, Plymouth, Wavendon, Worcester, Kent and Surrey,
Teignmouth, Gloucestershire, Carlisle, Lake District, Leicester,
Manchester, North Lancashire. _Unknown in Scotland._

* * * * *

THE MARBLED WHITE BUTTERFLY. (_Arge Galathea._)

(Plate V. fig. 3.)

This highly interesting and elegant insect would, by the uninitiated,
probably be classed among the last group of Butterflies--the Whites--from
the similarity in its colours; but from all those it may be readily
di