Colony populations of myrmica sulcinodis Nyl. (Hym. Formicidae)

Forty nests of the ant Myrmica sulcinodis Nyl. were collected from Tulloch Moor, Inverness-shire. The populations of workers and sexuals were counted and various morphometric measurements made.50% of the colonies had a queen, small colonies did not produce sexuals while males were produced mainly by large queenless colonies and gynes by large queened colonies. The data suggests that M. sulcinodis is a true monogynous species that only produces sexuals towards the end of the colonys life.