Diloba caeruleocephala is found in most of Europe except northern Scandinavia, the northern part of the British Isles and the North of Russia. In the South it occurs in North Africa and the Middle East (Lebanon, Israel and Jordan) also in Asia minor, Iran and Kazakhstan.It is largely missing in Portugal. In Europe the focus of spread is in southern Europe.
The wingspan is 30–40 mm. The length of the forewings is 15–19 mm. The heavily combed antennae of the male and the thick, woolly-hairy body of the female is untypical of Noctuidae. The forewings are grey or grey-brown with a purple sheen.The reniform and orbicular stigmata are both in the shape of a figure 8 enclosed in yellowish white. The post median and subterminal lines are black.There is a black tornal streak. The hinnwing is ochreous white. The cilia are greyish brown with a wedge-shaped black tornal mark.
- Waring, Paul, Martin Townsend and Richard Lewington (2003) Field Guide to the Moths of Great Britain and Ireland. British Wildlife Publishing, Hook, UK. ISBN 0-9531399-1-3.
- "Robinson, G. S., P. R. Ackery, I. J. Kitching, G. W. Beccaloni & L. M. Hernández, 2010. HOSTS - A Database of the World's Lepidopteran Hostplants. Natural History Museum, London".
- Halil Bolu & İnanç Özgen:, 2007 Life History and Biology of Diloba caeruleocephala (Figure of Eight) (Lepidoptera; Noctuidae). Belgian Journal of Zoology, 137(2): 133-136, Gent 2007 ISSN 0777-6276 pdf
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