Abstract
Worker and queen samples of the Argentine antIridomyrmex humilis were analysed using allozyme electrophoresis. Two loci,peptidase andglucosephosphate isomerase, were found to be stainable and polymorphic. Both revealed an estimated relatedness in nestmate females that was close to zero, which is a consequence of the strong polygyny in this species. The inbreeding coefficient was found to be close to zero, which can be explained, in spite of intra-nest mating taking place inI. humilis, by the high mobility of mated queens.
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