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The Moths of the British Isles Volume I Part 28

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The last two moths were respectively productions of Scotland and Wales; the present one is exclusively English, at least it was, because now and for perhaps the last fifty years it has been extinct in its old fenny haunts at Whittlesea, in Cambridgeshire, {218} and Yaxley, Huntingdonshire. In the latter fen it was first noted by Weaver about the year 1837. In 1846 and onwards it was plentiful, and the caterpillars were common. All was well with the species until about 1851 when the fens were drained, and the moth then ceased to appear. (Plate 108, Fig. 3.) In Sweden, Southern Russia, and in Amurland the species is represented by a bluish form, var.

_subcoerulea_, Staud.

THE DOUBLE DART (_Noctua_ (_Exarnis_) _augur_).

The dull brownish moth (Plate 110, Fig. 6), is generally distributed throughout the British Isles, including the Orkneys. The fore wings of southern specimens are usually suffused with reddish, but this is less obvious in northern examples. The markings are sometimes bold and striking or, on the other hand, only faintly defined, or largely absent. A pinkish-tinged brown form without markings was formerly confused with the Continental _A. helvetina_. The moth is on the wing in June and July, sometimes in August, especially in the north; and the caterpillar is to be found from July to May. When young it feeds on various low-growing plants, but later it crawls up at night to devour the leaves of hawthorn, sloe, sallow, birch, etc. It is brownish, tinged with pink, and marked on the back with a series of V-shaped dashes, and white points; on ring eleven there is a yellowish-edged black mark; above the white spiracles is a black-edged red-brown stripe. Head pale brown, freckled with darker brown.

THE AUTUMNAL RUSTIC (_Noctua glareosa_).

In its typical form as depicted on Plate 110, Fig. 4, this species is slaty grey with black markings. In Devonshire and other parts of the west of England, and also in Ireland, it a.s.sumes a decided pinkish tinge (var.

_rosea_, Tutt). Through Scotland the colour becomes darker grey, and in Perthshire it merges into blackish grey. In the Shetlands a blackish, or sooty-brown form (var. _edda_, Staud.), occurs.

[Ill.u.s.tration]

Pl. 112.

1. INGRAILED CLAY: _caterpillar_.

2. PURPLE CLAY: _caterpillar_.

3, 3a. SQUARE-SPOT RUSTIC: _caterpillar_.

[Ill.u.s.tration]

Pl. 113.

1. DOUBLE SQUARE-SPOT.

2. SQUARE-SPOTTED CLAY.

3, 4. PURPLE CLAY.

5, 6, 7. INGRAILED CLAY.

8, 9. INGRAILED CLAY, _var. conflua_.

10, 11. INGRAILED CLAY, _var. thulei_.

{219} The caterpillar feeds on gra.s.ses and various low plants, also on ling, heath, sallow, and has been found on wild hyacinth. It is yellowish-brown with dark shaded pale lines on the back, and a dark brown stripe on the sides; spiracles and dots blackish. October to June. The moth flies in August and September, and affects heathy places, borders of woods, etc., throughout the British Isles, including the Hebrides, Orkneys, and Shetlands. Except in the New Forest, Hampshire, it does not seem to be common in the southern counties of England; it occurs in Epping Forest, and in other parts of the eastern counties; northwards it becomes more generally distributed and more plentiful.

THE NEGLECTED, OR GREY RUSTIC (_Noctua castanea_).

The reddish typical form of this species is shown on Plate 110, Fig. 3.

Fig. 2 represents the greyish form, var. _neglecta_, which is most frequently met with in southern England. Between these extremes intermediate forms occur connecting one with the other. Specimens of a pale ochreous colour have been obtained in the vicinity of Market Drayton, Shropshire. The caterpillar, which feeds on heather and sallow at night, is pale reddish-brown, finely powdered with greyish; below the pale ochreous stripe on the sides, the ground colour is greenish; head marked with darker brown. September to May. The moth flies in August, and occurs on the larger tracts of heathery ground throughout the British Isles, but it is commoner in some parts than in others, and appears to be scarce in Ireland. The red form, and intermediates, occasionally occur in the New Forest, and also in other parts of Southern England, but in Scotland it is not uncommon. The distribution abroad is, like that of the last species, pretty much confined to Western Europe. {220}

THE DOTTED CLAY (_Noctua baja_).

This species, a male and female of which are shown on Plate 114, Figs. 7 [male] and 8 [female] is common in wooded districts throughout the British Isles, except the Orkneys and the Shetlands. The colour of the fore wings ranges from pale greyish brown, or reddish grey, to reddish brown or purplish brown. Sometimes the first and second cross lines are bordered, or represented, by pale bands.

The caterpillar is dingy ochreous brown, or reddish brown; three yellowish lines along the back, the central one edged with blackish; the others have blackish bordered yellow triangular marks between them, on each ring from three to eleven; spiracles and dots black; head pale brown, shining. It feeds in the autumn on various low plants, and in the spring on hawthorn, sloe, sallow, bramble, etc. September to May. The moth flies in July and August. Its range abroad extends to Amurland and to North America.

THE PLAIN CLAY (_Noctua depuncta_).

This species is represented on Plate 110, Fig. 5, by a female specimen.

Sometimes the fore wings are more reddish brown in colour, and the markings are occasionally bolder. The caterpillar is pale or dark reddish brown above, and rather greyish below; the back is marked with dark outlined diamonds, and the dark edged white spiracles have a dark shade above them, and an ochreous stripe below; head pale brown marked with darker. Feeds on primrose, dock, sorrel, nettle, etc. from September to May. The moth flies in July, August, and the early part of September. It seems to be more frequently and regularly obtained in Scotland, especially in the woods of Perthshire, Aberdeen and Moray. In England the species is, or has been, found in Oxfordshire (rare in beech woods), {221} Berkshire, Wiltshire (Savernake Forest), Devonshire (Dartmoor), South Wales (near Swansea), North Wales (Mold), Cheshire (one specimen, Staley-brushes), Yorkshire (Scarborough), Durham (one at Bishop Auckland), c.u.mberland (Barrow Wood).

The range abroad includes Central Europe (except Holland and Belgium), Southern Sweden, Lavonia, and South-east Russia, Armenia, and Northern Asia Minor. It may be noted that Stephens, writing in 1829, considered this to be a doubtful British species.

THE SETACEOUS HEBREW CHARACTER (_Noctua c-nigrum_).

A male specimen of this often common and generally distributed species is shown on Plate 110, Fig. 8. The fore wings vary in colour, from pale reddish grey through bright reddish or pinkish brown to purplish brown; the costal mark may be whitish, ochreous, or pinkish tinged. The moth is most frequently obtained in the autumn, but it is sometimes met with from May to July.

The caterpillar is pale brownish or greenish grey, with two series of black streaks, and a dark-edged pale central line, on the back; below the black outlined white spiracles is a black-edged yellow ochreous, or whitish stripe; head ochreous brown streaked with darker brown. It feeds on dock, chickweed, groundsel, and other low plants. It is said to feed from September to April or May. Possibly, however, in favourable seasons, some may pupate either in the autumn or in the early months of the year, and so attain the moth state greatly in advance of the majority. The range of this species' distribution extends to India, Corea, j.a.pan, and North America.

THE BLACK COLLAR (_Noctua flammatra_).

Fore wings pale greyish brown, with dark-edged pale cross lines; a pale whitish brown pink-tinged streak along the front {222} margin to the second line; below this is a short black dot; the reniform and orbicular marks are pale, the centre sometimes darker, and the claviform has a dark edge but is not distinct; the front of the thorax is broadly marked with black, hence the English name.

Only three British examples seem to be known; two of these were captured in the Isle of Wight, 1859 and 1876, and the third occurred in the lighthouse at Cromer in 1875. The range abroad is Central and Southern Europe, Western and Central Asia and India.

THE TRIPLE-SPOTTED CLAY (_Noctua ditrapezium_).

The ground colour of the fore wings of this moth ranges from pinkish brown through pale reddish brown to a purplish grey brown. The specimen shown on Plate 110, Fig. 9 [male] is of the pinkish brown form from Tilgate Forest in Suss.e.x. In a series bred from caterpillars obtained at Hampstead, North-west London, the bulk of the males are pale reddish brown, and the females purplish brown; one male, however, is as dark as the females.

Caterpillar, purplish brown, mottled above with dark brown; a thin white line, interrupted with black, along the middle of the back, and a row of black marks on each side; on the sides are oblique blackish marks, with the white spiracles showing distinct at their lower ends. Head pale shining brown, the cheeks marked with darker brown. Feeds on dandelion, dock, chickweed, primrose, and other low plants; also on bramble and sallow, and in the spring on the young leaves of birch. September to May (Plate 111, Fig. 2).

The moth flies, in and around woods, in July. It is local and not always common, but has been found in the north-west and south-west districts of London, Kent, Surrey, Suss.e.x, Hampshire, Dorsetshire, Devon, Wales (Swansea and Barmouth), and Norfolk (Cromer). It occurs in Scotland (Perthshire), and {223} two specimens have been recorded from Ireland. Its range extends to Siberia and Amurland.

THE DOUBLE SQUARE-SPOT (_Noctua triangulum_).

This species (Plate 113, Fig. 1) is usually pale brown, more or less tinged with reddish, but some specimens are of a rather darker hue, and others inclined to greyish. The conspicuous marks in the discal cell, usually black or blackish, are sometimes pale or dark reddish brown. The moth flies in June and July, and occurs in woods or well-timbered districts throughout England (except in Somerset, Dorset, and westward), Wales, Scotland (mainland), and Ireland.

THE SQUARE-SPOTTED CLAY (_Noctua stigmatica_).

As will be seen from its portrait (Plate 113, Fig. 2), this moth, although darker in colour, is marked somewhat similarly to the last referred to. It should be noted, however, that the basal line is less distinct; the submarginal line is inwardly shaded with blackish, and there is no blackish spot at its costal extremity. The fore wings are sometimes pale reddish brown, and sometimes almost blackish.

The caterpillar, which is ochreous, or brownish, is somewhat similar in marking to that of _A. ditrapezium_, and feeds on dandelion, dock, chickweed, plantain, sallow, etc. In confinement it is said to eat sliced carrot or potato, and, if kept warm, may be induced to feed up and attain the moth state early in the year.

The moth flies in July and August and seems to be partial to woods. It is very local, but occurs not uncommonly in the New Forest, Hampshire, and in Oxfordshire and Berkshire beech woods; also found in Buckinghamshire, the Eastern Counties, Kent, Suss.e.x, Dorsetshire, Devon, Lancashire (once), Yorkshire (very local), and North Wales (once). In Scotland {224} it appears to be more widely spread, but has not been noted in Ireland.

THE PURPLE CLAY (_Noctua brunnea_).

The fore wings of this moth (Plate 113, Figs. 3, 4) range in colour from purplish brown to reddish brown, or pale reddish brown; some of the darker forms are suffused with greyish, and the central area is occasionally ochreous tinged. There is also variation in the markings, especially the reniform stigma which is usually more or less filled in with ochreous or whitish tint, but not infrequently it is merely outlined in one of these colours, and the centre is then dark grey brown, sometimes enclosing a whitish or ochreous crescent. These remarks are of general application, but refer to a long series I obtained in North Devon.

The caterpillar (Plate 112, Fig. 2) is reddish brown with a yellowish tinge and with black dots and ochreous markings. It feeds on bilberry, wood-rush (_Luzula_), various low plants, bramble, sallow, and in the spring it attacks the buds and young leaves of the birch saplings, etc. August to May. The moth flies in June and July, and is often common in woods over almost the whole of the British Isles, including the Hebrides and the Orkneys. The range abroad extends to Amurland.

THE INGRAILED CLAY (_Noctua primulae_).

This species, long known as _festiva_, but for which Esper's earlier name _primulae_ will have to be adopted, is exceedingly variable. Specimens of the more or less typical form and also of the forms known as _conflua_ and _thulei_ are portrayed on Plate 113. The fore wings range in colour from pale ochreous to chestnut brown, and from grey to smoky grey brown. The cross lines are distinct in some specimens, but in others are hardly visible; the discal cell is often no darker than the {225} general colour, but sometimes there is a reddish square spot in place of the usual black one; the reniform and orbicular marks may be only faintly outlined, and the latter sometimes cannot be traced; the brownish band-like shade between the outer and submarginal lines is frequently only indicated by a short dash from the front margin, and even this is occasionally absent.

The smaller moorland and mountain form, var. _conflua_, Treitschke, and in the vulgar tongue The Lesser Ingrailed, varies on somewhat similar lines.

(Plate 113, Figs. 8, 9.) Var. _thulei_, Staudinger, also varies greatly in colour and in marking. Some specimens are dark reddish brown, or occasionally smoky brown; others are pale reddish brown, grey brown, reddish grey, or grey; the pale cross lines are generally distinct, in the darker specimens especially. This form, which is peculiar to the Shetland Isles, is shown on Plate 113, Figs. 10, 11. In the foregoing remarks reference has been made only to the general trend of variation; many other forms of aberration in this species might be mentioned if s.p.a.ce permitted.

The caterpillar is pale or dark reddish or olive brown inclining to pinkish between the rings; the lines are yellowish, the central paler edged with brown, and the outer ones edged with blackish marks; oblique darker dashes on the sides; spiracles black, ochreous ringed, with a pale stripe below them; head pale brown marked with darker. It feeds on primrose, bilberry, dock, sallow, hawthorn, bramble, etc. August to May. (Plate 112, Fig. 1.) The moth flies in June, but specimens of a second generation have been obtained, in confinement, from August to October. The species in one form or another occurs in woods, on moorlands, etc., over the whole of the British Isles.

THE BARRED CHESTNUT (_Noctua dahlii_).

The s.e.xes of this species are depicted on Plate 114. It will be noted that the female (Fig. 2) is darker in colour than the {226} male (Fig. 1). The s.e.xual colour difference holds good generally, but there are exceptions and the male may sometimes be dark, like the female; or the latter s.e.x may occasionally a.s.sume a reddish coloration. As a rule the reniform mark is most distinct in the female. A form occurring in Ireland with the fore wings dark sepia colour and the reniform mark clear whitish has been named var. _perfusca_, Kane. The caterpillar varies in the colour of the back through various shades of ochreous and brown to dark reddish brown, and this is always in strong contrast with the colour of the lower parts; the lines are pale, and the outer ones on the back are edged with black dashes; spots and spiracles black; head pale brown. It feeds on dock, plantain, etc., and in the spring on young sallow leaves. In confinement will become full grown before Christmas, but normally it feeds from September to May.

The moth is out in late July and in August. It is found on heaths, moorlands, and in woods; it is not uncommon in some parts of the Midlands, and is found in Cheshire and northwards to c.u.mberland. It also occurs in Herefordshire, Pembrokeshire; in the south and east of England it is not frequent, but has been taken in South Oxfordshire, Berkshire (Newbury), Suffolk, Hants (Winchester and New Forest), etc. Widely distributed in Scotland, and locally abundant in Ireland. The distribution abroad extends to Amurland and j.a.pan.

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The Moths of the British Isles Volume I Part 28 summary

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