Lampronia fuscatellaOlle Pellmyr
Depicted in Heath & Pelham-Clinton (1976). Wingspan 14-18 mm. Head orange or yellow. Forewing shining dark gray, sometimes with a purplish tinge. Hindwings of same color, without tinge.
Somewhat similar to flavifrontella, which differs in being smaller and paler.
Oviposition has not been observed, but by the time birch leaves have fallen the larvae can be found in roughly spherical galls on 3-13 mm thick twigs of Betula species. The galls are usually found at adjacent nodes, and are mostly found 1-1.5 m above the ground. The larva overwinters in the gall, creates an operculum in the spring, and pupates inside a thick white cocoon inside the gall as well. The larva is subject to parasitism. The adult ememges in early summer.
A west Palaearctic species spread from the British Isles through North and Central Europe to Russia west of the Urals.
Heath, J. & E.C. Pelham-Clinton. 1976. The moths and butterflies of Great Britain and Ireland, vol I: Incurvariidae. Blackwell Scientific Press and Curwen Press.
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Pellmyr, Olle. 1996. Lampronia fuscatella http://tolweb.org/Lampronia_fuscatella/12361/1996.01.01 in The Tree of Life Web Project, http://tolweb.org/. Version 01 January 1996 (under construction).