Workers of this dark coloured, slow moving species are seldom seen in the open. When disturbed, the female castes curl into balls and appear dead. Blacker & Collingwood (2002) provide a useful commentary on this ant based on their Wiltshire records.
In Britain, Myrmecina graminicola occurs throughout southern England, and just into the Midlands. There are a few records from south and west Wales. It occurs on the Scilly Isles and on the Channel Islands, but is not known from Ireland. Elsewhere, M. graminicola is present throughout Europe as far north as southern Sweden and east at least to the Caucasus. It also occurs in north-west Africa (Collingwood 1979; Czechowski et al. 2002). The possibility that records from southern parts of the Russian Far East and Korea refer to a closely related species cannot be ruled out (Czechowski et al. 2002).