Trypoxylon lactitarse

[5] These are fairly common harmless solitary wasps, although as with others of this same genus, the adult males can be observed to guard the nests.

[7] Females construct a linear series of cells that are subdivided by mud partitions.

[5][6][8] In the south of range, nesting activity has been recorded to occur throughout the year, although may be more common in certain months.

[9][10] Nests are provisioned with spiders captured and paralysed by the female wasp, which lays an egg within each elongate brood cell on one of several incapacitated spiders, which each larva will then consume as food within its own sealed brood cell.

Unlike some other cavity nesting wasps, no significant difference was found in the sex of the larvae relative to their brood-cell position.