Mason wasp

Description:

short waisted wasp around 20mm long, some red/orange colouration about the head and thorax, the wings were transparent brown with black tips. The abdomen was plain black with a grey bloom

Habitat:

sub-tropical arid tree/bush savanna with hot, wet summers and dry, mild winter

Notes:

the all black tail should be diagnostic, I imagine, as many of these type of wasp have bright red, orange or yellow bands or terminal portions to their abdomens