[5] However Gaskin stated that Philpott's illustrations labelled bipunctella were actually of G.

[6] Hudson, in his 1939 book A supplement to the butterflies and moths of New Zealand, corrected this error, illustrated G. bipunctella and discussed it in more detail.

[8] The male holotype, collected in Auckland by D. Bolton, is held at the Natural History Museum, London.

The fore-wings are triangular, termen oblique, brownish-cream-colour, with pale grey, but very distinct markings; first-line double, from about 1⁄4 of costa to 1⁄3 of dorsum, strongly outwards bowed beneath costa; 2nd line also double, slightly waved, from about 3⁄4 of costa to 3⁄4 of dorsum, strongly bowed outwards immediately below costa; discal dot small, clear white, outlined in grey; a fine blackish grey terminal line, and three clear black dots on termen above tornus; no costal marking between origin of second line and apex; cilia white, narrowly silvery-metallic at base.

The hindwings are very pale brownish-white, almost pure white towards base, a fine grey terminal line; cilia clear white with faint greyish sub-basal line.[7]G.