The Small Pearl-bordered, our first example, is one of the lesser Fritillaries, and is shown in Plate II (fig. 5).
The arrangement of the black markings on the upper surface will be readily made out from the coloured plate, but the pattern of the under side will require a little special notice, for it is here, as with the other Fritillaries, that we find the chief marks by which we identify the species. On this side (fig. 67) the fore wings are light orange brown, with a patch of darker brown near the tips, and spotted with a dull black. The hind wings have the light brown displaced by a very warm chestnut tint, some yellow, and bright silvery spots.
[Ill.u.s.tration: FIG. 67.--THE SMALL PEARL-BORDERED FRITILLARY--UNDER SIDE.]
Seven silvery spots of triangular form border the hind margin. A large one occupies the centre of the wing, and ten others are somewhat irregularly scattered over other parts of the wing--five between the central spot and the hind margin, and five between it and the costa.
All the spots on these wings, whether yellow, chestnut, or silver, are bordered by a narrow black line.
_Selene_ is not a very abundant b.u.t.terfly, but is widely distributed in England, and is also found in parts of Scotland. Its favourite resorts are clearings in woods, especially those of Kent and other southern counties.
It appears in May and June, in which latter month it deposits its eggs on the dog violet (_Viola canina_).
The caterpillar is not fully grown at the end of the summer, and hybernates during the winter among the roots of its food plant. In the following spring it emerges again, and feeds till May, when it changes to the chrysalis on a stem. It is less than an inch long when fully grown, and is of a dark-brown colour. Six rows of hairy spines are arranged longitudinally on its body.
The chrysalis is greyish brown, and has a number of very short projections corresponding with the spines of the caterpillar.
_The Pearl-bordered Fritillary_ (_Argynnis Euphrosyne_)
There is very little difference in the size of this and that of the last species, but _Euphrosyne_ (Plate II, fig. 6) is generally a trifle larger. The two b.u.t.terflies are also very similar in appearance; indeed, they are so much alike on the upper side that it is impossible to decide on the name of either without an examination of the under surface.
_Euphrosyne_ has a border of seven triangular silver spots on each hind wing, exactly corresponding with those of _Selene_. It has also the large central spot of silver. But, beside these, there is _only one_ other, and that is situated in the basal angle. Thus there are only nine silvery or pearly spots on each hind wing of _Euphrosyne_, while there are seventeen on _Selene_. This will form a ready means of distinguishing between the two species.
[Ill.u.s.tration: FIG. 68.--THE PEARL-BORDERED FRITILLARY--UNDER SIDE.]
The seasons and localities of this b.u.t.terfly correspond very closely with those of the last species, but it is much more common, and may be found in abundance in nearly all our southern woods during May and June.
The caterpillar, also, feeds on the same plant (dog violet) as _Selene_.
It is black, with whitish lines along the sides; and is provided with a number of bristly spines.
The chrysalis is of a grey-brown colour, with small dots of a paler tint on the wing cases; and its body has a number of short conical projections exactly corresponding with the spines of the caterpillar.
_The Queen of Spain Fritillary_ (_Argynnis Latona_)
We now pa.s.s from the commonest to the rarest and most prized of our wood b.u.t.terflies--The Queen of Spain (Plate II, fig. 7). This royal personage is not easily mistaken for any of the meaner Fritillaries even when the upper surface only is examined, as the concave hind margins of the fore wings serve as an almost conclusive mark of distinction. The rich tawny brown of this side is boldly marked with black, and the long hairs and scales of the bases of the wings are tinged with green.
The under side presents a most beautiful appearance. Here the ground colour is paler than that of the upper side. The fore wings are spotted with black, and have a few small patches of silver at the tips. Each hind wing has no fewer than twenty-four bright silvery spots. Seven of these, mostly of large size, adorn the hind margin, and above each of these is a small one in the middle of a little patch of dark brown. The arrangement of the others is not quite so easily described, but may be readily made out from our ill.u.s.tration.
[Ill.u.s.tration: FIG. 69.--THE QUEEN OF SPAIN FRITILLARY--UNDER SIDE.]
This rare gem among British b.u.t.terflies has been taken in many localities, but in very small numbers. Seeing that it is a common insect on the other side of the Channel, and that the British captures have been made chiefly in the Isle of Wight and on the south coast, I am inclined to believe that many of the highly valued genuine Britishers have no right to their t.i.tle, but are visitors that have spent only a few days within our sh.o.r.es, having flown or been blown across the sea.
It is not likely that many of my readers will ever meet with _Latona_ during their rambles in our own country, and if they are anxious to have the species represented in their collections, they will probably have to purchase either a British or a foreign specimen, the former of which will command a very high price, while the latter may be obtained for three or four pence.
The perfect insect may be looked for in August and September, during which time the eggs are laid on the leaves of violets and the heartsease (_Viola canina_, _V. odorata_, and _V. tricolor_).
The caterpillar is brown, with numerous yellowish spines, and has three whitish or yellowish stripes--one down the middle of the back and one along each side. It hybernates during the winter, and is fully grown in the following June or July. I hope that my reader will be so fortunate as to secure either this or some other stage of this rare and beautiful insect. The chances are decidedly against him, but that is no reason why he should abstain from a vigorous search when he happens to be "doing" the southern counties.
_The Dark-green Fritillary_ (_Argynnis Aglaia_)
This b.u.t.terfly is larger than _Latona_, as will be seen by reference to Plate II, fig. 8. Its colour is, as usual with the Fritillaries, a tawny brown with black markings. The female is usually larger than the male, and she is further distinguished by the ground colour being darker and the black markings larger.
The under side of the fore wings is very similar in colour and markings to the upper, but there are silvery spots near the tips. The hind wings are beautifully tinted with olive green and brown, and studded with silver. The arrangement of the latter is not easily described, but is accurately represented in the accompanying woodcut.
[Ill.u.s.tration: FIG. 70.--THE DARK-GREEN FRITILLARY--UNDER SIDE.]
The favourite resorts of this insect are wooded spots, and also heaths and downs clad with heather or ferns, where its food plant (the dog violet) lies scattered; but it seems to be less partial to woods than the other Fritillaries. It is very widely distributed throughout England, and is common in parts of Scotland and Ireland.
The perfect insect is on the wing in July and early August.
The caterpillar first appears toward the end of August, and commences its period of hybernation among the roots of its food plant before it has grown to any considerable size. It comes out again in the spring, and continues to feed till the beginning or middle of July, and then changes to the chrysalis state, after protecting itself by binding three or four leaves together.
Its colour is a velvety black, with dark and glossy grey between the segments. There is a double yellow line along the back, and a thin line of orange yellow on each side below the spiracles. It has a number of black hairy spines, arranged in six longitudinal rows.
The chrysalis is of a shiny black colour, with brownish abdomen; and the conical projections are black with yellow tips.
_The High-brown Fritillary_ (_Argynnis Adippe_)
The upper side of this b.u.t.terfly is so much like that of _Aglaia_ that it would be difficult indeed to give a written description of one that did not almost equally well apply to the other; so we look to the under surface for the chief marks by which we can distinguish between them.
On this side (Plate III, fig. 1) the fore wings are much the same as those of _Aglaia_. The hind wings, too, are very similarly coloured and marked, but here we have a distinguishing feature in a row of rust-red spots with silvery centres, just inside the silver border of the hind margin.
[Ill.u.s.tration: FIG. 71.--THE HIGH-BROWN FRITILLARY.]
This b.u.t.terfly is common in open s.p.a.ces of woods in many parts of England, more particularly in the south, and seems to be also fond of hilly heaths and moors.
It is on the wing in July, and, towards the end of this month and in the beginning of August, the eggs are laid on the leaves of the dog violet (_Viola canina_) and heartsease (_V. tricolor_).
The young caterpillar emerges about two weeks later, and feeds only for a short time before it seeks out its winter quarters among the dead leaves at the root of its food plant. The feeding is resumed in the spring, and continued till the month of June, when it is fully grown. At this time it is about an inch and a half long. Its head is black, and its body pinkish brown. A white line extends down the back, but is interrupted by several black marks. The spines, of which there are six rows, are white, with pinkish tips.
_The Silver-washed Fritillary_ (_Argynnis Paphia_)
This beautiful and n.o.ble b.u.t.terfly is the largest of the Fritillaries, and the most powerful on the wing. During the latter part of June and throughout July it may be seen gracefully sweeping through the trees and undergrowth of woods, often settling down on a favourite flower for a short time. So strong is its flight that it is useless to attempt to pursue it for any distance. Sometimes it will sail along a wooded path, followed at short intervals by others of its species, and may be taken in the net as it pa.s.ses. But perhaps the most successful method of netting _Paphia_ is to wait till it has settled, and then secure it by a quick upward or side stroke of the net. If then you miss your aim, off it will dart, sailing over the tree tops till, in a very short time, it is quite out of sight.
[Ill.u.s.tration: FIG. 72.--THE SILVER-WASHED FRITILLARY--UNDER SIDE.]
The upper side of this b.u.t.terfly is shown in Plate III, fig. 2, where the general arrangement of the black spots on the rich orange-brown ground is carefully marked. There is a considerable difference between the male and female of this species. The figure on Plate III represents the male. The female does not possess the broad black lines that follow the course of the veins of the fore wings; the basal portions of all four wings are also tinged with a rich olive-brown colour, often with a decided tendency to green; and the black spots of all the wings are larger.
The under side is particularly rich in its decorations. The front wings are of the usual orange brown, chequered with black. The hind wings are partly brown and partly orange, and exhibit beautiful greenish reflections. They have also two bars of silver, and a silvery spot in the basal angle, all with rather indefinite outlines.
The female lays her eggs late in July on the food plants (_Viola canina_ and _V. odorata_) or on the moss that surrounds them.
About two weeks later the young caterpillar is out and feeding; and then, after a few more weeks, while it is yet very small, it hides among the dead leaves at the roots. Early in the spring it resumes its feeding, and is full grown at the end of May.