Excavator: Stems. The species nests primarily in the dead stems of Rubus, but nests have also been found in Sambucus, Euphorbia characias and Vitis vinifera. (Terzo, 2000). Nest burrows are excavated in the early summer in the exposed pith of dead stems of a variety of plant species, particularly Rubus fruticosus agg. The cells are separated from one another by transverse partitions of compacted wood dust. Male and female cells are not clearly segregated within the nest. In some nests the female parent remains with her developing brood until they mature, and they may survive to mingle with the young adults in the autumn. The new generation of bees emerge from their pupae during the late summer. The autumn and winter months are spent in adult diapause, within a hibernaculum. This is probably the cleaned out vacated nest, as has been noted in other temperate Ceratina species (Daly, 1983). The hibernaculum resembles a nest, but lacks cell partitions. The adult bees enter the hibernaculum head first and remain in this position throughout the winter. The nesting biology of this species has been described in detail by Else (1995).