The wingspan is 35–50 mm. In the male the forewings are whitish ochreous, brownish tinged, especially towards the costa. There is a very indistinct fuscous discal dot and a posterior series of several fuscous dots between veins. The hindwings are whitish, towards apex brownish tinged. In the female the forewings and hindwings are whitish. Larva blackish, hairs yellowish; pencils on 2 and 12 brownish or blackish, tufts on 5 through 8 yellowish.[1]
Mazzei, Paolo; Morel, Daniel & Panfili, Raniero. "Laelia coenosa (Hübner, [1808])". Moths and Butterflies of Europe and North Africa. Retrieved 15 May 2020.