Field and laboratory studies of different species of Iberian ants with
the eggs and larvae of Nemoptera bipennis and Lertha sofiae (Neuropte
ra: Nemopteridae: Nemopterinae), suggest a previously unknown myrmecop
hilous life-style in the larvae of this subfamily. A wide range of pot
entially edaphic prey was offered to newly hatched larvae, but growth
occurred only when ant larvae were used as food. Furthermore, ant work
ers harvest its eggs, as though they were seeds, and introduce them in
to their nest. Ant tolerance of larvae inside the nest is proved and d
iscussed, and the acquisition of the colony odor or some other appease
ment mechanisms against ants is suggested. Similarities in the ecologi
cal requirements of the Nemopterinae imagoes and harvester ants have b
een observed and a coevolutionary process among plants (as seed produc
ers), nemopterines (as plant pollinator image and ant-predator larva)
and ants (as seed harvesters and predator lodgers) is suggested.