Comprehensive DescriptionRead full entry
This genus is very closely related to Tetramorium HNS , differing only in having the antennae of the worker and female 11- instead of 12-jointed. The scrobes of the antennae are well developed in all the species known to me.
The genus is widely distributed, being represented by a number of species in tropical Africa, Madagascar, the Indomalayan and Australian Regions and by one species, X. spinosus (Pergande) HNS , with several subspecies, in the Sonoran Province of North America. The various species nest in the ground, like Tetramorium HNS , often in very populous colonies.