8. Dipt. helioctypa, n. sp. Male, female.—14–15 mm. Head, palpi, and thorax rather dark greyishfuscous mixed with whitish-ochreous, palpi white at base beneath. Antennæ dark fuscous. Abdomen fuscous-grey, irrorated with ochreous towards base, apex whitish-ochreous. Legs grey, posterior pair whitishgrey. Forewings triangular, moderate, not very strongly dilated, costa nearly straight, slightly sinuate in middle, apex rounded, hindmargin oblique, both sinuations slight; very pale whitish-ochreous, almost wholly irregularly suffused with ochreous-fuscous, except an ill-defined patch in disc before first line, another on costa beyoud middle, and a third extending along lower two-thirds of hindmargin; a well-defined slender dark fuscous transverse line from costa at ⅖ to inner margin before middle, hardly curved outwards, thrice rather strongly and irregularly dentate; a second dark fuscous transverse line from costa at ¾ to inner margin a little before anal angle, followed by a pale line of the ground-colour, margined posteriorly by the ochreous-fuscous suffusion, upper half irregularly curved outwards, lower half curved inwards, slightly sinuate above inner margin; a small irregularly oval clear white spot in disc beyond middle, suffusedly connected above with the pale costal patch; three small dark ochreous-fuscous spots near together on hindmargin below middle: cilia ochreous-grey-whitish, with a fuscous line near base, and an ill-defined white spot in each sinuation. Hindwings dark fuscous-grey; cilia grey-whitish, with a dark grey line near base. A very distinct species, not particularly allied to any other, differing from all in the dark fuscous-grey hindwings, and the slightness of both hindmarginal sinuations; there are no metallic markings. Taken commonly by Mr. R. W. Fereday, near Lake Wakatipu, in January. 9. Dipt. elaina, n. sp. Male, female.—12–14 mm. Head, palpi, and thorax ochreous-grey-whitish, irregularly mixed with dark fuscous. Antennæ whitish-grey. Abdomen whitish-grey, apex more whitish. Legs grey-whitish. Forewings triangular, broad, costa very slightly arched, apex rounded, hindmargin rather strongly oblique, second sinuation slight; ochreous-grey-whitish, rather closely irrorated with dark fuscous, and with a slight irregular pale yellowish suffusion, causing a faint greenish tinge; the fuscous irroration is closest and darkest near base, along hindmargin, and on an indistinct median band; a dark fuscous transverse line from ⅓ of costa to ⅖ of inner margin, very slightly outwards-curved, thrice irregularly dentate, preceded by an indistinct pale line; a small black linear transverse spot in disc above and slightly beyond middle, above which is a suffused dark fuscous