Warren states.H. cavernosa Ev. (= ornata H.-Sch.) (21 f). Forewing violet grey, suffused with fuscous; inner margin below vein 1 prominently yellowish white, a sharp-pointed black streak from the base below vein 1; lines vertical; stigmata large and conspicuous, deep olive brown; claviform bullet-shaped; orbicular round, black-edged, open at the top; reniform with dark centre; outer line minutely dentate, pale-edged, with 2 longer grey teeth along veins 3, 4 touching a subterminal line, which is white, preceded by double dark blotches on the folds and at costa, and an oblong grey blotch between veins 6 and 7; hindwing fuscous, with cell spot and terminal area darker. A South European species found in Italy, Switzerland, Hungary, Austria and
S. E. Russia: extending from the Altai Mts. in W. Siberia to Ussuri in E. Siberia, and occurring in W. and E. Turkestan and Mongolia.
[2]
The larva is green, thickest in the middle and tapering forward and backwards. It
has a thin yellow or orange lateral line and two thin white dorsal lines that can be lined with blackish shadows.
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