Leaf-mine: Details unknown.

Larva: Details unknown.

Puparium: Details unknown.

Comments: Spencer (1990) deduced from the distinctive genitalia that infuscata is a grass-feeder.

Hosts in Britain: Unknown.

Hosts elsewhere: Unknown.

Time of year - larvae: Unknown.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Rare. Records include Cambridge (Chippenham Fen) (Spencer, 1972: 50, as portentosa), Dunbarton (Bonhill) (Bland, 1994c: 82) and Huntingdonshire (NBN Gateway - N.B. includes Watsonian Vice Counties having publicly available records that fall within or overlap the vice county border at 10km resolution or better i.e. a record for a vice county may relate to an adjacent vice county - for included datasets see NBN Grid map below).

NBN Grid map: Note that not all datasets on the NBN Gateway may be available on the map below. If you are an NBN Gateway registered user you can request access for missing datasets via the link 'Open interactive map in new window' below.

Distribution elsewhere: Widespread in continental Europe including Denmark, Sweden, Finland, Germany (Spencer, 1976: 254), Belgium, Czech Republic, French mainland, Latvia, Lithuania, Poland, Slovakia and Spanish mainland (Martinez in Fauna Europaea).

NBN interactive distribution map(s) of known host species in Great Britain and Ireland and elsewhere:

Parasitoids in Britain and elsewhere: Unknown.