De Sélys-Longchamps E. 1844.
Énumération des insectes Lépidoptères de la Belgique. — Mémoires de la Société royale des Sciences de Liége
1–35. On page 23.
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Specimens in nature
Light to dark grey body with two large black dots and some smaller black spots on each segment. Head black.
A loose cocoon consisting of a few spun silken threads. Pupa dark yellowish with head, wing sheats and last abdominal segment black.
The larvae live gregariously in a silken web. Before pupation the larvae leave the web and make a very slight, more or less spherical web close to the ground. Each larva spins a slight silken web inside the spherical web.
The adults are active at night and come to light.