Acupalpa is revised to include five described species: A. albitarsa Mann, A
. divisa (Walker), A. pollinosa Mann, A. rostrata Krober and A. semirufa Ma
nn, and one new species, A. irwini sp, n. All species are brightly coloured
wasp mimics with morphological and behavioural characteristics associated
with mimicry of pompilid wasps. A key to genera and species is presented wi
th male and female genitalia described and figured for the first time. All
species of Acupalpa were compared in a cladistic analysis with two species
of Agapophytus using 34 states across 16 adult morphological characters, wh
ich resulted in three most parsimonious trees (length = 58 steps). The phyl
ogenetic relationships of species of Acupalpa are discussed in light of the
analysis.