Myrmus miriformis


Length 6-8 mm (male) 8.5-10 mm (female). In contrast to other rhopalidae, Myrmus miriformis and Chorosoma schillingi are rather hairless as adults and elongate in shape, bearing a superficial resemblance to some of the mirid grass bugs. Myrmus miriformis males have two colour morphs: a green form (marked with red) and a brown form, while females are always green. The sexes also differ markedly in size; females are larger and more oval. This species usually has very short, rudimentary wings.

Identification difficulty


Found in dry and damp grassland habitats, feeding on the leaves and unripe seeds of various grasses.

When to see it

Adult: June-October.

UK Status

Commonly distributed throughout England and Wales at least.

VC55 Status

Common in Leicestershire and Rutland.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map