Myrmica rubra is one of the common 'red' ants. Workers have antennal scapes that are long and slender with a gentle curve at the base. The area between the spines on the propodeum is smooth and shining and the spines are shorter than in other Myrmica. The petiole node has an indistinct dorsal area sloping smoothly down to its join with the postpetiole. Queens are similar to workers but larger. Male scapes are long and slender. The male tibia and tarsi have long projecting hairs.
Locally common in England and Wales with scattered records in Scotland and Ireland. It occurs in almost all of Europe and Palaearctic Asia.