On 3 December 1855, Edward Newman read a paper to the Entomological Society of London on Characters of a few Australian Lepidoptera, collected by Mr. Thomas R. Oxley, subsequently published (in 1856) in the society’s Transactions (New Series, 3(8): 281-300). Oxley’s specimens were collected in Victoria, Australia, “at Forest Creek, Barker’s Creek and Campbell’s Creek, all on the Mount Alexander Range, and at a distance of about eighty miles from Melbourne.”
This paper described one new plume moth on page 300:
Genus PTEROPHORUS, Geoffroy.
Sp. 1. Pterophorus tinctidactylus, Newm.
Albus citreo-tinctus, lunula alarum pallide fusca anticarum, posticis dilute ochreo-cinereis. (Alarum dilat. ·65 unc.)
[i.e. Lemon-tinged white, with a pale fuscous crescent on the fore wings, and with hind wings slightly ochreous grey. (Wingspan 0.65 ? inches ?)]
White with a very slight tinge of lemon colour; on the fore wings is an indistinct brown mark just at the base of the cleft ; the hind wings are pale ochreous grey.
A single specimen only was taken ; it a good deal resembles P. osteodactylus, but is readily distinguished by the paler colour of the posterior wings, and by the citron-yellow — not fuscous hue — of the antennae. A second species of Pterophorus also forms part of the collection, but is so injured that I cannot venture to characterize it.
The type for tinctidactylus is apparently lost. Subsequent authors have suggested various ways to interpret Newman’s description.
Writing of Australian Pyralidina in 1885, Edward Meyrick simply wrote that he could not speak with certainty of P. tinctidactylus, Newm.
In 1994, Michael Schaffer and Ebbe S. Nielsen (in Nielsen E.S, Edwards E.D. & Rangsi T.V., Checklist of the Lepidoptera of Australia) offered a new combination, Hellinsia tinctidactylus (Newman, 1856). No explanation was offered, but this reflects Newman’s original statement that his species resembled Pterophorus osteodactylus, which is now treated as Hellinsia osteodactylus (Zeller, 1841).
In 2003, Cees Gielis (in World Catalogue of Insects Volume 4: Pterophoroidea &Alucitoidea (Lepidoptera)) tentatively (with two question marks) suggested that Newman’s species might be an alternative name for Platyptilia celidotus (Meyrick, 1884). If this proved true, Newman’s name predates Meyrick’s and would become the accepted name for the species. However, there seems no reason to suggest the identity between these species. Newman is clear that his insect is yellowish, whereas Platyptilia celidotus is a greyish to ivory-coloured insect. P. celidotus does have an streak at the base of the forewing cleft, but this is straight and angled.
There is however an Australian plume moth found in the region where Oxley collected his specimens and which fits Newman’s short description. His comparison was with Hellinsia osteodactylus, which indeed has a lemon-coloured tinge:
Imbophorus aptalis (Walker, 1864) (originally Aciptilus aptalis Walker, 1864) is a lemon-yellow coloured species with a variable crescent-shaped fuscous mark at the base of the cleft, yellow antennae, and paler hindwings than Hellinsia osteodactylus:
The resemblance seems clear. Again, Newman’s description actually predates Walker’s description of Aciptilia aptalis and the name would have precedence, if the type were still available for confirmation.