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Stem-borer: Larva feeds internally in stem (Spencer, 1990: 27).

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.

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:

Ranunculaceae
Anemone	nemorosa	Wood Anemone		Spencer, 1972b: 88, adults only

Hosts elsewhere:

Ranunculaceae
? Anemone	nemorosa	Wood Anemone		Spencer, 1976: 456
Anemone	nemorosa	Wood Anemone		Spencer, 1990: 27

Time of year - larvae: Currently unknown.

Time of year - adults: May.

Distribution in Great Britain and Ireland: Widespread in Britain including Surrey (Selsdon), Sussex (Laughton), Oxford (Bagley) (Spencer, 1972b: 88) and Lanark (Braidwood) (Bland, 1994c: 83); Dorset, East Kent and South-west Yorkshire (NBN Atlas).

Distribution elsewhere: Widespread in continental Europe including Denmark, Finland, Norway, Sweden (Spencer, 1976: 456), Germany (Spencer, 1976: 574), Belgium, Czech Republic, Estonia, French mainland, Hungary, Italian mainland, Lithuania, Republic of Moldova, Poland, Slovakia and Switzerland (Fauna Europaea).

NBN Atlas links to known host species:

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