Leaf-miner: Lower-surface tentiform mine, 13-15 mm long, with several longitudinal folds (Bladmineerders van Europa). Frass to one side (British
Difficult to distinguish between P. hostis and P. blancardella on the basis of mine characteristics - both form arched tubes on the leaf of M.sylvestris. P.hostis tends to make the larger mine on Malus sylvestris. The undersurface of the mine is creased, with other creases alongside. This species was previously identified as P. cydoniella in the UK (British
Larva: Details unknown.
Pupa: In a cocoon (British
leafminers). Pupa 3.5 - 3.9 mm; cremaster similar to that of Ph. anceps (Bladmineerders van Europa).
The adult is illustrated in UKMoths.
The male and female genitalia are illustrated by the Lepidoptera Dissection
Hosts in Great Britain & Ireland:
of year - larvae:
of year - adults:
in Great Britain & Ireland: Fleet, Hants (British
See also British
leafminers distribution map.
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elsewhere: Widespread in continental Europe including Germany, Italian mainland, Macedonia, Norwegian mainland and Yugoslavia (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.