The wingspan is 4–5 mm. The thick erect hairs on the head vertex are orange and the collar dark bronze fuscous-white. Antennal eyecaps are whitish. Forewings are shining deep purplish-bronze ; a shining whitish fascia beyond middle; apical area beyond this dark purple-fuscous Hindwings are grey.[2][3]
Adults are bivoltine and are on wing from May to June and again in August.[4]
Egg
The egg is laid on the underside of a leaf in June or August, usually near the midrib.[5][6]
Stigmella hybnerella was described by the English entomologist, Henry Tibbats Stainton in 1854 from a type specimen found in England. The genus Stigmella – ″stigma″, refers to the conspicuous (or occasionally metallic) small dot or a brand fascia on the forewing of many of the Stigmella species, or possibly the small size of the moths. The species nameplagicolella refers to plaga – flat, open ground and colo– to inhabit, on blackthorn, often occurring is such situations.[8]
^Meyrick, E., 1895 A Handbook of British Lepidoptera MacMillan, London
^ Zagulajev, A.K., 1987 Nepticulidae (Stigmellidae); in G.S. Medvedev (ed.): Keys to the insects of the europaean part of the USSR, Vol.IV: Lepidoptera, part 1 (english translation), Oxonian Press Pvt.Ltd., New Dehli, 1987
^ abcEmmet, A M (1983). Heath, John (ed.). Nepticulidae. In The Moths and Butterflies of Great Britain and Ireland. Colchester: Harley Books. pp. 226–228. ISBN0-946589-15-1.
^Emmet, A M (1988). A Field Guide to the smaller British Lepidoptera (Second ed.). London: British Entomological & Natural History Society. p. 24. ISBN0-9502891-6-7.