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Queen. Similar to a microgyne M. sabuletiHNS but distinguished by the laterally enlarged postpetiole, wider frons and excessive development of body hairs. Head width: 1.05 mm. Body length: 5.2 mm. Mean postpetiole width: 0.675 mm.
Distribution. Rare, Dorset, South England only.
Biology. This species was discovered by Elmes (1978) in a small group of colonies containing apparently normal M. sabuletiHNS workers and in some cases normal queens. The small queens were at first assumed to be microgynes of M. sabuletiHNS but body pilosity and relative postpetiole measurements were found to be outside the range of that species. In size and appearance M. hirsutaHNS resembles M. myrmecoxena Forel found once only as a parasite of M. lobicornisHNS in Switzerland and also has affinities with the similar but much larger Myrmica bibikoffi KutterHNS (1963).
Found most commonly in these habitats: 1 times found in coniferous forest.
Found most commonly in these microhabitats: 1 times under stone, 1 times from nest containing 3 queens + 2641 workers M. sabuleti and 47 queens M. hirsuta.
Elevations: collected at 1163 m