Arctornis in Singapore.

[Psyche]

Likely Arctornis rufimarginata.
https://www.mothsofborneo.com/part-5...thini_1_57.php
Wings are uniform white (ie without corrugation or rippled scales).
Fringe & costa golden-brown. Swinhoe states rufous (reddish)
The colour is rendered too grey causing the brown to appear blackish.
Jan. 2019 CWC.
https://inaturalist-open-data.s3.ama...799/large.jpeg


Possibly Arctornis hedleyi.. Prominent FW marginal grey 'triangles'.
https://www.mothsofborneo.com/part-5...thini_1_71.php
Dec. 2021 USR.
https://inaturalist-open-data.s3.ama...542/large.jpeg

[Psyche]

Probable Arctornis perfecta.
The only satiny white species here with an acute FW (male) & lack a discal spot.
Uniform white without corrugation or condensed scales.
https://www.mothsofborneo.com/part-5...thini_1_36.php
https://inaturalist-open-data.s3.ama...676/large.jpeg
The 2nd pic shows with a deeper brown patch besides each eye(whitish) & the palps shaded dark brown ventrally.
The brown bar across the base of the antennae is not visible here.
https://inaturalist-open-data.s3.ama...694/large.jpeg

Other similar species have a black discal spot.
UnIDed species.
Fron is marked as described for A. submarginata but wingshape is incorrect.
https://inaturalist-open-data.s3.ama...8487/large.jpg

[Psyche]

Probable Arctornis rhopica.
Some resemblance to A. poecilonipha.
Frons , palps rufous brown.
Jan 2020 Mandai Road.
https://inaturalist-open-data.s3.ama.../original.jpeg
https://inaturalist-open-data.s3.ama.../original.jpeg
https://inaturalist-open-data.s3.ama...9024/large.jpg
https://www.mothsofborneo.com/part-5...thini_1_34.php

For comparison. P. Malaysia.
Probable A. rhopica.
https://inaturalist-open-data.s3.ama...4650/large.jpg
A. poecilonipha.
https://static.inaturalist.org/photo...7098/large.jpg

[Zicky]

Dear Doctor Seow,

Would then this observation be faded female Arctornis singaporensis?
I do not understand the part where scale structure can be corrugated, but this observation is white, veins are green and lacks a discal spot
Inat link - https://www.inaturalist.org/observations/142270783

Skipping regards
Zicky

[Psyche]

Dear Doctor Seow,

Would then this observation be faded female Arctornis singaporensis?
I do not understand the part where scale structure can be corrugated, but this observation is white, veins are green and lacks a discal spot
Inat link - https://www.inaturalist.org/observations/142270783

Skipping regards
Zicky

Yes.
A. singaporensis; No discal spot; no corrugation, green veins ;vein-stripes enhanced in the female.


Corrugation : formings ridges , like roof tiles.
ARCTONIS.png

[Psyche]

Arctornis submarginata.
Widespread species.
Range India to Australia.
A minor pest on tea in NE India. Also feed on Cinnamomum species.
Female. reared from oak. India.
https://www.researchgate.net/profile...richophora.png

One observation matches Holloway's description well.
The frons have a band across the bases of the antennae & across the eyes, the two bands merging; palps ochreous shaded at the tip.
Feb 2917 Pasir Ris.
https://static.inaturalist.org/photos/6209209/large.jpg
FW with a discal black dot, & lightly corrugated scalings.
FW costa lightly edged ochreous & fringes light grey.
https://www.mothsofborneo.com/part-5...thini_1_46.php

From this the following observations can be included
Oct. 2020 Yio Chu Kang.Female (rounded FWs).
The triangular piece is part of the frons between the eyes.
https://inaturalist-open-data.s3.ama...4449/large.jpg
https://inaturalist-open-data.s3.ama...4454/large.jpg

Aug 2020 Woodlands Male.
https://inaturalist-open-data.s3.ama...734/large.jpeg
https://inaturalist-open-data.s3.ama...637/large.jpeg
https://inaturalist-open-data.s3.ama...739/large.jpeg

Aug 2014. Botanic Garden. Female.
https://inaturalist-open-data.s3.ama...3905/large.jpg
https://inaturalist-open-data.s3.ama...3904/large.jpg

[Psyche]

Arctornis hipparia.


This is an enigmatic species in as much as the type location is Singapore.
Holloway states the following features.
1. Satiny white with reflective scales coarse.
2. Fringes narrowly brownish ( Most Arctornis have the fringes grey).
3. Frons reddish & palps tipped ochreous.
4. Legs only faintly spotted.
https://www.mothsofborneo.com/part-5...thini_1_73.php


Only one observation comes close.
Probable A. hipparia. Aug. 2018. Mulu N.P. Sarawak. It helps that some of Holloway's specimens also came from Mulu.
https://inaturalist-open-data.s3.ama...6620/large.jpg

Added. This looks correct; Note coarse corrugations, brownish fringes & legs faintly spotted.
Aug. 2021 Bukit Panjang.
https://static.inaturalist.org/photo...4890/large.jpg

[Zicky]

Dear Doctor Seow

I shot the following Arctornis at bukit batok today. It has a discal spot, but the antenna,palps and frons are quite well hidden. I cant really decide if it has corrgated marks base on your comments, but i think its Arctornis riguata. I would like to hear your inputs.

Inat link - https://www.inaturalist.org/observations/146109518

Skipping regards
Zicky

[Psyche]

Post 13.
Unknown species.
There are many which can not be identified.

TL Seow; Cheers.