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Volume 72, 1942-43
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– 371 –

Descriptions of Two New Species of Lepidoptera.

[Read before the Otago Institute, October 13, 1942; received by the Editor, November 23, 1942; issued separately, March, 1943.]

Ichneutica homerica n. sp. Fig. 1.


Head grey. Thorax grey with the patagia outlined in black.

Thorax stout, being 9 mm. broad by 6 mm. deep.

Forelegs dark brown with ochreous annulations at joints.

Abdomen grey-brown with darker lines across each segment.

Wing expanse 47 mm. Ground colour of wing dull greyish brown.

Markings distinct in grey or black.

Greyish patch at base—basal line black.

First line grey distinctly edged with black. Space between first line and basal line shows grey patches outlined in black. Second line strongly indented, grey. Space between this and first line darker than the rest of the wing and including an indented darker line. Subterminal area clouded with darker patches.

Reniform and orbicular appear as clear, ochreous patches, not very distinct in their outline. The reniform is margined outwardly with a patch of ochreous grey.

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Fig. 1.

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Fig. 2.

Veins are outlined in black with grey-brown points at base of cilia. Cilia black.

In perfect specimens a faint bluish irridescence enriches the forewings.

Hindwings grey with a faint cloudy median line. Lunule faint. Cilia grey with a brownish tint at base.

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Wing expanse 51 mm. Thorax grey and not showing so distinctly the darker lines on the patagia as in the male.

General colour lighter than that of male.

Cilia of forewings barred black and grey.

The underwings being lighter than those of male the median line shows more distinctly.

Cilia light grey with two distinct darker lines.

This species was fairly commonly attracted to light at Homer. Two specimens seen on different days flying over the open ground in the daytime.

The general colour of this fine moth is very similar to the colouration of the rock formations in the district.

There is hardly any variation, but a number of specimens taken are slightly smaller than the types selected.

Plentiful from 17th December until 4th January, after which only an odd specimen was seen. Types and co-types in author's collection.

Selidosema berylia n. sp. Fig. 2.

Head and thorax dark brown, abdomen ochreous.

Antennal pectinations long—dark brown.

Wing expanse 47 mm.

Forewings dull coppery brown with markings indistinct, being but slightly darker than the general surface.

Discal spot elongate and distinct.

The basal line is very small.

First line shows plainly on costa, is faintly indicated across wing and then again distinct on dorsum.

Second line also faint in centre of wing with a sharp angulation outwards just above dorsum.

Subterminal line faintly indicated except near apex, where three or four dots form a dark area. One or two of these dark marks have white dots on their terminal side.

All these lines are faint, being but slightly darker than the general surface of the wings, and they vary in intensity slightly in different specimens.

The veins are lightly outlined in darker ending in a terminal series of black dots.

Cilia brownish grey.

Underwings grey-white with minute dots of darker grey.

Cilia ochreous-white. Discal dot small but plainly indicated.

Attracted to light at Homer. Two specimens taken early in January, while from January to May Mrs J. Sutherland kindly collected for me about 70 specimens—all at light. This large number was secured in the hopes of getting the female, but none appeared. There was very little variation except that the depth of colouring was lighter in some specimens. The size was fairly constant, varying from 42 mm. to 47 mm. The female may prove to be apterous. Male types in author's collection.