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Here is another family with but one British member; but in this, as in the last case, the only representative is a really beautiful insect. The male Pavonia is shown on Plate X (fig. 8), and will need no written description as an aid to its identification. The female is larger, and similarly marked, but the ground colour of the wings is pale grey.
This moth is abundant almost everywhere, and may be looked for in the neighbourhood of heaths and woods early in the month of May.
The larva feeds on a large number of plants and trees, among which may be mentioned the willow (Salix alba), blackthorn (Prunus spinosa), elder (Sambucus nigra), whitethorn (Cratægus oxyacantha), bramble (Rubus fruticosus), heaths (Erica tetralix and E. cinerea), and the meadow-sweet (Spiræa ulmaria). Its colour is a lovely green; and each segment has several pink tubercles, each surrounded by a black ring, and giving rise to a tuft of short black hairs. The spiracles are orange.
In the autumn it spins a pear-shaped cocoon of silk, open at the small end (fig. 28).
It may here be mentioned in passing that, in the case of some of the larger moths of the few preceding families, the young entomologist is likely to meet with larvæ more frequently than the perfect insect. These moths, however, are mostly very hardy and easily reared; and a beginner cannot do better than endeavour to obtain either ova or larvæ, in order that he may be able to watch the different species through their various stages.
Family – DrepanulidæWe now reach a family containing six small moths that differ in many important particulars from those we have just been considering. They are of such slender build that a beginner may easily mistake them for Geometers. Their wings, though small, are broad, and well proportioned to their bodies. In five cases out of the six the front wings are more or less hooked at the tips, and on this account the moths in question are called the Hook Tips.
The larvæ are not hairy, but they all have little fleshy projections on their backs. Their bodies also taper to a point behind, and the last pair of claspers are wanting, so that they have only fourteen walking appendages. When at rest they usually fix themselves by their claspers only, their pointed 'tails' being directed slightly upward, and all the front segments being also elevated. When about to change, they descend to the ground, and spin their cocoons among dead leaves.
Two only of this family can receive an individual notice.
The Oak Hook Tip (Drepana binaria)This can hardly be described as a very common moth, but it is fairly plentiful in the woods of the southern counties of England.
Fig. 129. – The Oak Hook Tip.
Its wings are yellowish brown, marked with two lighter transverse lines. There are two black spots between the lines of the fore wings. The antennæ of the male are pectinated; those of the female simple. The latter sex is further distinguished by the paler colour of the hind wings.
The larva is brown, with a broad stripe, edged with yellow, down the back. There are two projections on the back of the fourth segment. It feeds on oak (Quercus Robur) and birch (Betula alba).
This moth is double-brooded, and may be seen on the wing in June and August. The larva may be beaten from the above-mentioned trees in June and July, and again in September.
The Chinese Character (Cilix glaucata)
Fig. 130. – The Chinese Character.
The fore wings of this species are white, with a broad dark blotch from the inner margin to near the costa. The central portion of this blotch is marked with silvery spots which are said to resemble Chinese characters. The hind margin is shaded with a dark grey border, inside which is a row of dark spots. The hind wings are clouded with grey.
This moth is widely distributed, and seems to be common throughout England. It is double brooded, the first brood appearing in May and June, and the second in August.
The caterpillar, which is brown, with two prominent tubercles on each of the third and fourth segments, feeds on the whitethorn (Cratægus oxyacantha), and the blackthorn (Prunus spinosa).
Family – DicranuridæThe five British species that represent this family are such interesting insects that we should like to have given a detailed description of all of them, but our limited space will allow of no more than an outline of the general characteristics of the group and a selection of two for individual mention.
They are thick-bodied moths, and the prevailing colours are white and shades of grey. The antennæ are pectinated in the males, and, with the exception of the Lobster Moth (Fagi), in the females also.
The larvæ, like those of the last family, have no anal claspers, and stand, when at rest, with both ends of the body raised. They have two 'tails' projecting from the last segment. The largest of them (the Puss), and three smaller species (Kittens) that closely resemble it in habits, all construct hard cocoons to be presently described; but the larva of the Lobster Moth spins a light cocoon among the leaves of trees.
They all spend the winter in the chrysalis state.
The Poplar Kitten (Dicranura bifida)
Fig. 131. – The Poplar Kitten.
Our illustration shows the arrangement of the white and grey on the wings of this moth, but the other Kittens (Bicuspis and Furcula) so closely resemble it that it is necessary to point out a mark of distinction. It will be observed that the fore wings are crossed by a broad grey band, edged with black. This band, in the present species, is almost of the same width throughout, its interior margin being almost straight, and the exterior one slightly concave. In Furcula, the outer margin of the band is generally sharply bent inward just below the costa. In Bicuspis the grey band varies considerably in shape, but both this and the dark blotch near the tip of the wing are more sharply defined than in the other two species.
The caterpillar is green, dotted with brown, and has a brown stripe on the back. This stripe is broken on the third segment, and widens out on the eighth and thirteenth segments. It feeds on the Poplar (Populus nigra) and Aspen (P. tremula).
When full grown it descends to the trunk of the tree, and constructs a very hard cocoon of a glutinous substance from its own body mingled with little pieces of the bark that it removes for the purpose. Thus made, the cocoon so closely resembles the surrounding bark that detection is very difficult. I have frequently found these cocoons on the inner surface of loose bark.
This moth is widely distributed, and may be searched for in June and July. The larva feeds during August and September.
The Puss (Dicranura vinula)
Fig. 132. – The Puss Moth.
No written description is necessary in this case, the illustration easily serving for identification. This beautiful moth flies in May and June, and is common everywhere.
The caterpillar is a very interesting creature. It is green, with a hump on the fourth segment, and a patch of brown from the fourth segment to the tail. This patch is very wide on the eighth segment, but tapers to a point on the thirteenth. The two horns are rather long and rough, and from each of them a very slender pink filament is protruded when the caterpillar is irritated.
It constructs a cocoon very similar to that of Bifida, though of course larger, on the bark of the tree on which it fed, generally three or four feet from the ground. It feeds on sallows, willows, and poplars, and may be found during July and August.
Family – NotodontidæThe Coxcomb Prominent (Lophopteryx camelina)The family Notodontidæ contains several moths of somewhat varied appearance, but foremost among them are the 'Prominents,' distinguished by a conspicuous projection on the inner margin of the fore wings.
Fig. 133. – The Coxcomb Prominent.
Our example of this group is the Coxcomb Prominent.
Its fore wings are brown, with darker markings arranged as shown in the illustration; and the hind margins are scalloped. The hind wings are much paler, with a dark brown patch in the anal angle.
The caterpillar is green, with a yellowish line on each side. The spiracles are black, and there are two small humps on the twelfth segment. It feeds during August, September, and October, on various trees, including the oak, birch, poplar, hazel, and alder.
The moth flies from June to August, and is moderately common and widely distributed.
Family – PygæridæThe Buff Tip (Phalera bucephala)The first of our two examples of this small family is the common and destructive Buff Tip. The perfect insect is represented on Plate X, fig. 9, and is too well known to require a lengthy description. During June and July it may be seen resting on the bark of trees almost everywhere, with its wings folded closely round its body, and its antennæ tucked under the wings, looking just like a piece of stick, or a projection of the bark on which it sits.
Fig. 134. – The Larva of Bucephala.
The caterpillars appear towards the end of June, and may be seen in dense clusters on lime and other trees, sometimes twenty or thirty huddled together on a single leaf. As they grow larger they retain their gregarious tendencies, and often completely strip the leaves from large branches. They are of a dull yellow colour, hairy, and have seven broken black lines, one along the middle of the back, and three on each side. The head and legs are black.
When full grown, they descend to the root of the tree, burrow into the soil, and there remain in the chrysalis state till the following June. The chief food plants of this species are the lime (Tilia vulgaris), elm (Ulmus campestris), and hazel (Corylus Avellana).
The Chocolate Tip (Pygæra curtula)This species is not nearly so common as the last, but is to be met with more or less in most of the English counties in the month of May.
Fig. 135. – The Chocolate Tip.
Its fore wings are light greyish brown, crossed with four transverse paler streaks, and tipped with a patch of chocolate brown. The hind wings are pale yellowish grey.
The young caterpillars feed in companies between leaves which they have spun together, but when nearly full grown they cease to be gregarious. They are also very different in appearance at different ages. When fully fed, the larva is of a reddish-grey colour, spotted with black, with a double row of orange-coloured warts on each side. There is also a little black hump on each of the fifth and twelfth segments.
The food plants of this species are sallows (Salix caprea and S. cinerea), poplar (Populus nigra), and aspen (P. tremula).
Family – CymatophoridæThis, the last family of the Bombyces, contains seven species of moderate size, the larvæ of which are either quite smooth or have small warty prominences. The seven species are grouped into three genera, from two of which we shall select a representative.
The Peach Blossom (Thyatira Batis)
Fig. 136. – The Peach Blossom.
The popular name of this pretty little moth is given on account of the resemblance of the pink patches of its olive-brown fore wings to the petals of the peach flower. It is a moderately common moth, widely distributed in England and Ireland, and flies during June and July.
The caterpillar is marbled with reddish grey and brown, and has a hump on the third segment, and a smaller prominence on each of the segments six to ten inclusive. It feeds on the bramble (Rubus fruticosus) during August and September, and spends the winter in the chrysalis state, inclosed in a loose cocoon among the dead leaves at the root of its food plant.
The Yellow-horned (Asphalia flavicornis)This is one of the earliest of our moths, appearing on the wing in March, when it may be attracted by means of sugar placed on the bark of the birch (Betula alba).
Fig. 137. – The Yellow-horned.
The wings are grey, with a decidedly greenish tinge, crossed by three dark lines near the base, and two others, which are zigzag, just outside the centre. Between these two sets of lines is a conspicuous round pale spot. The hind wings are greyish brown, darker along the hind margin.
The larva, which feeds on the above-named tree, is pale greenish, with both white and black dots. It rolls itself up in a leaf, and seldom ventures out of the retreat thus formed. It is fully fed in July or August.
CHAPTER XIX
THE NOCTUÆ
We have already noticed that several of our moths fly by day; that some come out of their hiding places at dusk, and settle down again to rest before the deepest shadows of night fall; and that others prefer the darkest hours of the night. The tribe of moths we are next to consider includes the greater number (about three hundred) of our truly nocturnal species, hence the name that heads this chapter.
They are generally of a somewhat dingy appearance, the prevailing colours being dull shades of grey, drab, and brown. So closely, in fact, do certain of them resemble each other, that the greatest care has to be exercised in the identification of species – a task that is rendered still more difficult by the variations that we observe in the tints and markings of certain species.
These moths have generally rather stout bodies. Their fore wings are somewhat narrow, and, when the insects are at rest, these are brought close to the body, and the hind pair are folded up beneath them.
Family – BryophilidæThe Marbled Beauty (Bryophila Perla)Our first family – the Bryophilidæ– contains only four British species. These are small and slender-bodied moths, whose larvæ feed in early morning on the lichens that cover stones and old walls, and conceal themselves by day in holes and chinks and under stones.
The Marbled Beauty is the only moth of this family that may be described as common with us. It is abundant in nearly every English county, as well as in parts of Scotland and Ireland.
Fig. 138. – The Marbled Beauty.
Its wings are very pale grey, marked with a darker bluish grey, as shown in the engraving. These markings are variable, but the bases of the fore wings have always a dark blotch, followed by a patch of pale grey or white, extending the whole width of the wing. The moth may be found from the beginning of July to the middle of September.
The larva feeds from February to April. It is black above, with a broad orange-bordered stripe down the back; and its body is covered with small warts, each of which bears a single hair.
Family – BombycoidæIn this family there are sixteen British moths, several of which are exceedingly common. They are much larger than the Bryophilidæ, and of a much stouter build. The larvæ are covered with little hair-bearing warts, and are, indeed, often so hairy that they may be mistaken for the caterpillars of the Bombyces.
The Grey Dagger (Acronycta Psi)
Fig. 139. – The Grey Dagger.
This is the commonest of all the Bombycoidæ. It may be found at rest on tree trunks and palings during the daytime throughout the summer. Its fore wings are pale grey, with four conspicuous black marks, one of which – that in the anal angle – resembles the Greek letter psi (ψ) placed sideways.
The larva is black or very dark grey, with a pale yellow line down the back, and a black hump on each of the fifth and twelfth segments, that on the fifth being much larger than the other. It feeds in the autumn on lime (Tilia vulgaris), blackthorn (Prunus spinosa), whitethorn (Cratægus oxyacantha), fruit trees, and various other trees, shrubs, and herbs.
The moth called the Dark Dagger (Tridens) is hardly to be distinguished from Psi. It is not really any darker, and its markings are almost exactly similar; but the larva is very different.
The Poplar Grey (Acronycta megacephala)This is also a very common moth, to be found in all the southern and midland counties, wherever poplars abound, during June and July.
Fig. 140. – The Poplar Grey.
Its fore wings are grey, marbled with a very dark grey. A little inside the middle of these wings, near the costa, is a round spot with a dark centre. This spot is represented in a large number of the Noctuæ, and is known as the orbicular. It will be observed that in the present species it is very distinct.
The caterpillar is dark grey, with a line of black dots down the back; and it has a number of little warts, bearing hairs. On the back of the eleventh segment is a rather large pale spot. It feeds during August on various species of poplar, and changes to a chrysalis in a crevice of the bark.
The Figure of Eight (Diloba cæruleocephala)
Fig. 141. – The Figure of Eight.
The fore wings are brownish grey. Near the middle of the wing, but nearer the costa than the inner margin, are two whitish spots that resemble the figure 8. The hind wings are dull brownish grey, with darker wing rays, and a dark spot near the centre.
This moth is common in all parts, and flies during September.
The caterpillar emerges from the egg in spring, and is fully grown in May or June. It is of a very pale colour – yellowish or greenish – with a broad and broken yellow stripe down the back, and a bluish or greenish stripe on each side. Its head is blue (hence the specific name) with two black spots. It feeds on the hawthorn (Cratægus oxyacantha) and various fruit trees; and on the twigs of these (especially the hawthorn) the little clusters of eggs may be seen during the winter.
Family – LeucaniidæIn this family we have a number of rather small moths, with, generally, no markings on their wings, save, perhaps, a few dots or streaks.
Their larvæ feed principally on grasses and reeds, and change to the chrysalis state either in a cocoon among the food plants, or under the surface of the ground.
Several of these insects are very common, and most of them abound in fens and marshes.
The Brown-line Bright-eye (Leucania conigera)
Fig. 142. – The Brown-line Bright-eye.
The fore wings are yellowish brown. The 'brown line' is a transverse line parallel with the hind margin, and distant from it about one-fourth the length of the wing. Another dark brown line, describing a sharp bend, passes across the wing near the base. The 'bright eye' is a light spot just outside the centre of the wing, nearer the costa than the inner margin. This is another of those marks that occur very constantly in the wings of the Noctuæ. It lies beyond the orbicular spot, and is usually somewhat kidney-shaped, and is consequently named the reniform.
The caterpillar is yellowish or greyish, with a pale dorsal line edged with black. On each side of this is a broad black line, below which is a yellow line edged with black, then a whitish stripe, next a yellow line edged with black on the upper side, and lastly a broad brownish line, just above the spiracles, edged with black on both sides. It feeds on couch grass (Agropyron repens) and various other grasses, and is fully grown in May.
The moth flies in July and August, and is common throughout the United Kingdom.
The Smoky Wainscot (Leucania impura)This same genus includes a number of moths, very similar in general appearance, and popularly known as the 'Wainscots.' Of these we shall take two examples.
Fig. 143. – The Smoky Wainscot.
The first is the Smoky Wainscot, so called from the dark smoky tint of the hind wings. Its fore wings are wainscot brown, with lighter rays; and they each have three black dots arranged in the form of a triangle, one in the centre, and the other two between this and the hind margin.
The caterpillar is yellowish, with a fine white line down the back. The spiracles are red, and inclosed in black rings. It feeds on sedges (Carex) from March to May.
The moth is on the wing from June to August.
The Common Wainscot (Leucania pallens)
Fig. 144. – The Common Wainscot.
This moth is very much like the last. The fore wings exhibit the same three dots, but it may be distinguished by the pale colour of the hind wings.
The larva feeds on various grasses in March and April. It is of a pinkish grey colour, with two rows of black dots on each side of the dorsal line. There are also three stripes along the side, two of which are brownish and the other grey.
The moth is common everywhere from June to August.
The Bullrush (Nonagria arundinis)Our last example of this family is the Bullrush, a moth that is common in all parts where its food plant abounds.
Fig. 145. – The Bullrush.
It is much larger than the two preceding species. The fore wings are yellowish brown, with three parallel transverse lines of black spots. The hind wings are whitish, tinged with brown near the hind margin.
The caterpillar is of a dull pinkish colour, with a shining brownish plate on the second segment. The spiracles are black. It feeds inside the stems of the reed-mace (Typha latifolia), and changes to a chrysalis within the gallery it has excavated, after making a hole through which it can escape when it attains the perfect form.
The caterpillar may be found in May and June, the chrysalis in August, and the moth in September.
Family – ApameidæThis large family contains no less than forty-four British species, many of which are exceedingly common; and of the others only about half a dozen can be regarded as rare.
Most of them are of medium size, and with one or two exceptions are dressed in rather dingy garbs; but, although the ground colours are dull, the various markings of the wings are sharply defined. They may be searched for on palings and the bark of trees by day, at which time they repose with their wings sloping like the sides of the roof of a house. Some are easily attracted by lights, and others partake freely of the entomologist's 'sugar.'
The larvæ have small retractile heads, and feed on low-growing plants, keeping themselves well concealed on the lower leaves close to the ground.
The Frosted Orange (Gortyna Ochracea)
Fig. 146. – The Frosted Orange.