There are several strategies of mating behavior in ants. Three species (Lasius niger L., M. ruginodis Nyl., and Formika rufa L.) with different strategies of mating behavior were studied. Winged ants (Lasius niger and M. ruginodis) form flying swarms in order to reach the necessary conditions for mating and to form colony. The active flight is not a primary factor for successful reproduction of F. rufa. Alate L. niger and M. ruginodis individuals have distinct anomalies in wing venation, but those of F. rufa are characterized by various kinds of anomalies. Relationships between the type and number of anomalies and ant size and sex were found. The data obtained support a hypothesis that the uniform wing venation in ants is a result of stabilizing selection.