I agree but I'm not very confident. The st. line is more like jacchusalis/marcidilinea.

with your comment about the ST line. I have been looking hard at the MPG images in particular and think we can rule out Z. protumnusalis which usually has (i) a thick/dark section of PM line close to costa, (ii) a rather inconspicuous ST line with a wider yellow spot at the costa. I now favor Z. marcidilinea and by an extraordinary coincidence moved an old (2015) image to this species about an hour before your posting. I would appreciate your view on this earlier image! Regarding Z. jacchusalis, my thinking was that PM lines of my specimens were insufficiently wavy, especially the costa-proximal section. I very much appreciate your help and comments.

Moving images to Zanclognatha jacchusalis or marcidilinea but feel free to move to species as you see fit. I think the am. and pm. lines for this example and your other example, which you mention, may be too bold for marcidilinea. On the other hand, I'm not sure the hind wing would be so pale. I guess marcidilinea might be a better call. I sent a few of my images to MPG a while back and Lafontaine commented. Take a look here and here.

Yes, I think we can rule out protumnusalis. I don't think the waviness of the am. matters so much. I think the key is contrast between am. and pm. lines and the ground color, contrast between forewing and hindwing, and contrast between the pale yellow st. line and the dark edging. The hindwing of marcidilinea gets darker as you approach the inner margin so the small amount that you can see in your other image is probably not useful.

I am happy to leave these on the joint Zanclognatha jacchusalis or marcidilinea page (which I had not seen before) and have moved the other image from last year to the joint page as well (although I still favor Z. marcidilinea for that one). Hopefully one or both specimens will get a more definitive ID later. Many thanks.