Mine a descending and widening corridor, in the end an elongate
blotch that may occupy the entire width of the leaf. The mine contracts
somewhat, narrowing the leaf. Frass in some elongate lumps in the
centre of the mine (Bladmineerders van Europa).
Larva: The larvae of moths have a head capsule and chewing mouthparts with opposable mandibles (see video of a gracillarid larva feeding), six thoracic legs and abdominal legs (see examples).
The larva of bisulcella has body dull grey green with a narrow dorsal line; head pale brown
with darker marking; prothoracic plate dark brown, irregularly divided
(Bladmineerders van Europa).
Pupa: The pupae of moths have visible head appendages, wings and legs which lie in sheaths (see examples).
The adult is illustrated in UKMoths by Mark Cubitt. The male genitalia, but not the female genitalia (check for update), are illustrated by the Lepidoptera
Festuca arundinacea is
treated as Schedonorus
arundinacea (Tall Fescue) by Stace (2010).
Hosts in Great Britain & Ireland:
of year - larvae:
Autumn till June; larvae hibernate in the mine (Bladmineerders van Europa).
of year - adults: Currently unknown.
in Great Britain & Ireland: Britain including Bedfordshire (VC30),
Cambridgeshire (VC29), Cardiganshire (VC46), Derbyshire (VC57), Glamorganshire (VC41), Herefordshire (VC36),
Huntingdonshire (VC31), Kincardineshire (VC91), North Aberdeenshire (VC93), North Hampshire (VC12), North Somerset (VC6), North Wiltshire (VC7), Northamptonshire (VC32), Pembrokeshire (VC45), Shropshire (VC40),
South Aberdeenshire (VC92), South Wiltshire (VC8), Staffordshire (VC39), Warwickshire (VC38), West Gloucestershire (VC34) and Worcestershire (VC37) (NBN
recorded in the Republic of Ireland (Karsholt and van Nieukerken
in Fauna Europaea). See also Ireland's NBDC interactive map.
NBN Grid Map:
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elsewhere: Widespread in continental Europe including Austria,
Belgium, Corsica, Czech Republic, Danish mainland, Estonia, Finland,
French mainland, Germany, Hungary, Italian mainland, Latvia, Lithuania,
Norwegian mainland, Poland, Romania, Russia - Northwest, Slovakia,
Sweden, Switzerland and The Netherlands (Karsholt and van Nieukerken
in Fauna Europaea).
NBN Interactive Grid Maps of known host species:
British and Irish Parasitoids in Britain and elsewhere: Currently unknown.