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Leaf-miner: A small primary upper surface blotch (Spencer, 1976: 251).

Primary upper-surface blotch. Pupation outside the mine (Bladmineerders van Europa).

Larva: The larvae of flies are leg-less maggots without a head capsule (see examples). They never have thoracic or abdominal legs. They do not have chewing mouthparts, although they do have a characteristic cephalo-pharyngeal skeleton (see examples), usually visible internally through the body wall.

Posterior spiracles each with about 8 bulbs (Spencer, 1976: 251).

Puparium: The puparia of flies are formed within the hardened last larval skin or puparium and as a result sheaths enclosing head appendages, wings and legs are not visible externally (see examples).

Hosts in Great Britain and Ireland:

Asteraceae
Hieracium				Mines in BMNH
Hieracium				Robbins, 1991: 123
Hieracium	sabaudum			Robbins, 1989: 22, as perpropinquum
Hieracium	vulgatum	Common Hawkweed		Spencer, 1972b: 113

Hosts elsewhere:

Asteraceae
Hieracium				Spencer, 1976: 251
Hieracium				Spencer, 1990: 259
Hieracium	lachenalii	Tall Hawkweed		Spencer, 1976: 251
Hieracium	lachenalii	Tall Hawkweed		Bladmineerders van Europa
Hieracium	laevigatum	Tongue-leaved Hawkweed		Spencer, 1976: 251
Hieracium	laevigatum	Tongue-leaved Hawkweed		Bladmineerders van Europa
Hieracium	murorum			Spencer, 1976: 251
Hieracium	murorum			Bladmineerders van Europa
Hieracium	sparsum			Bladmineerders van Europa
Hieracium	vulgatum	Common Hawkweed		Spencer, 1976: 251
Hieracium	vulgatum	Common Hawkweed		Bladmineerders van Europa

Time of year - mines: October.

Time of year - adults: Currently unknown.

Distribution in Great Britain and Ireland: Widespread in Britain, including Denbighshire (Cefn-y-bedd), London (Hampstead), Somerset (Cheddar), Derbyshire (Miller's Dale) (Spencer, 1972b: 57) and Warwickshire (Keresley) (Robbins, 1991: 123); North Somerset (NBN Atlas).

Leaf mines probably referable to this species also seen at Kent (Dungeness) (Spencer, 1972b: 57).

Distribution elsewhere: Widespread in continental Europe including Finland, Norway, Sweden and Germany (Spencer, 1976: 251), The Netherlands (Bladmineerders van Europa), Czech Republic and Lithuania (Fauna Europaea).

NBN Atlas links to known host species:

British and Irish Parasitoids in Britain and elsewhere: Currently unknown.