Thygater aethiops (Smith, 1854)
Biology:
Bees nested singly or forming aggregations in flat ground or sloping surfaces. Nests were deep (39-59 cm) and consisted of an unlined but smooth long main tunnel meandering downward from the surface. Nests had three to seven nearly vertical cells, which were located singly at the ends of short vertical tunnels that descended from the main tunnel. The older brood was located closer to the nest entrance, indicating a progressive nest development. Monthly sampling and appraisal of museum specimens showed that, although females were more commonly collected than males, both sexes were present year-round.