British Insects: the Genus Phyllonorycter (Lepidoptera-Gracillariidae)
Associated with trees. On Betulaceae; Alnus.
Larvae. The larvae mining in leaves; in the under-side. Found in July, or September to November.
Adults. Face coloured (brassy). Head orange. Thorax shining-metallic; brassy.
Wing-span 9–10 mm. Forewings shining orange tinged golden ochreous, or brownish orange to golden brown; without a basal streak; with well defined pale strigulae (these quite brassy). Costal strigulae 4. The ground colour darkening gradually towards the inner edges of the pale fasciae and strigulae. Dorsal strigulae 4. Forewings with two transverse pale fasciae (via coalescence of the first two pairs of strigulae, which are indistinguishable as discrete entities); with two costal spots beyond the second fascia, or with three costal spots beyond the second fascia (the first two conspicuous and ochreous-tinged, the third if present, obscure).
Adults abroad May and August.
Illustrations. • Phyllonorycter species on Alder.
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’.