Antennal glands of the slave-making ant Polyergus rufescens and its slave species, Formica cunicularia (Hymenoptera, Formicidae).

The fine morphology of glandular structures associated with the antennae is reported for the first time ina social parasite ant, the obligate slave-maker Polyergus rufescens. In this species, external pores have been detected through scanning electron microscopy only on the scape of the female castes, queen & worker. Each pore is associated internally with a bicellular secretory unit by means of a cuticular duct. The number of secretory cells appears to be higher in queens than in workers. Similar exocrine structures have been found in workers of Formica cunicularia, a common host species of P. rufescens.