Stem borer: Larva feeds as an internal stem-borer (Spencer, 1976: 51).

Larva: Mandibles with one large and one small tooth (Spencer, 1976: 52, fig. 41); posterior spiracles virtually adjoining, each with an ellipse of some 15 bulbs around a strong central horn (Spencer, 1976: 51).

Puparium: Greyish-white (Spencer, 1976: 51).

Comments: Spencer (1966a: 21) and Spencer (1972b: 16, 19, 111, 112) misidentifed British specimens of oligophaga as dettmeri.

Hosts in Britain: Unknown.

Hosts elsewhere:

Time of year - larvae: Unknown.

Time of year - adults: Unknown.

Distribution in Great Britain and Ireland: Britain including Cheshire, Denbighshire and Flintshire (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 (Spencer, 1990: 394), Belarus, Czech Republic, French mainland, Latvia, Lithuania, Poland, Slovakia, Spanish mainland and The Netherlands (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.