British Insects: the Genus Phyllonorycter (Lepidoptera-Gracillariidae)
Synonym: Phyllonorycter strigifasciella (Stainton).
Associated with trees. On Ulmaceae; Ulmus.
Larvae. The larvae mining in leaves; in the under-side. Found in July, or September to November.
Adults. Face whitish. Head brown. Thorax cinnamon brown; not shining-metallic.
Wing-span 7–9 mm. Forewings shining golden brownish orange; not clear shining white; without a basal streak; with well defined pale strigulae (shading from whitish to brown). Costal strigulae 4. Dorsal strigulae 3, or 4. Forewings with the first costal strigula not forming an acute angle with a dorsal one; with two transverse pale fasciae, or with three transverse pale fasciae (the first two pairs of strigulae being coalesced and indistinguishable as entities, the third pair constituting a markedly angled fascia that tends to be interrupted). Hindwing cilia fuscous.
Adults abroad May and August.
Illustrations. • Phyllonorycter species on Elm. • Phyllonorycter tristrigella (specimen): photo.
To view illustrations with legends giving names in current use, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, and distributions of character states within any set of taxa, as well as source references and other relevant material.
Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the genus Phyllonorycter (Lepidoptera-Gracillariidae). Version: 29th December 2011. http://delta-intkey.com’.