Hypsopygia glaucinalis is a moth of the family Pyralidae. It is sometimes[1] placed in the genusOrthopygia either alone or with a few other species. Being the type species of Orthopygia, as soon as O. glaucinalis is placed in Ocrasa (as is done here) "Orthopygia" is abolished. To further complicate matters, Ocrasa is now mostly treated as a synonym or subgenus of Hypsopygia.
Figs 3. 3a, 3b, 3c, 3d larvae in various stages in accumulations of twigs and rubbish at knots of birch
The caterpillars feed on decaying plants and dry leaves. They have been found in some fairly unusual locations, such as Buteo nests, straw and thatching, and discarded paper.[2]
Grabe, Albert (1942): Eigenartige Geschmacksrichtungen bei Kleinschmetterlingsraupen ["Strange tastes among micromoth caterpillars"]. Zeitschrift des Wiener Entomologen-Vereins27: 105-109 [in German]. PDF fulltext
Savela, Markku (2005): Markku Savela's Lepidoptera and some other life forms – Orthopygia. Version of 2005-SEP-08. Retrieved 2010-APR-12.