Key to the 7 eriococcid species known to occur on Leptospermum spp. The key is based on adult females morphology and is taken from Hoy (1959), with modifications to insert the new species and to update terminology. 1 Antennae 6 segmented .................................................................................................................................................. 2 - Antennae 7 segmented .................................................................................................................................................. 6 2 Cup-shaped invagination of macrotubular ducts markedly asymmetrical ................................................. E. orariensis - Cup-shaped invagination of macrotubular ducts more or less symmetrical ................................................................. 3 3 Mesal margin of anal lobes beset with teeth ................................................................................................ E. spiniger - Mesal margin of anal lobes without teeth ..................................................................................................................... 4 4 Some dorsal enlarged setae equal in size to marginal setae ..................................................................... E. leptospermi - All dorsal enlarged setae markedly smaller than marginal setae .................................................................................. 5 5 Marginal enlarged setae of penultimate abdominal segment almost as long as anal lobes .......................... E. cultellus - Marginal enlarged setae of penultimate abdominal segment much shorter than anal lobes ....................... E. campbelli 6 Marginal enlarged setae much longer than dorsal setae ................................................. A. mariannae Pellizzari sp. n. - Marginal setae not obviously longer than dorsal setae ................................................................................................. 7 7 Dorsal enlarged setae each with almost parallel sides and a blunt tip; hind coxa with few pores ................. E. gibbus - Dorsal enlarged setae sharply conical; hind coxa without pores ..................................................................... E. milleri

Published as part of Pellizzari, Giuseppina & Germain, Jean-François, 2010, A new species of Acanthococcus (Hemiptera, Coccoidea, Eriococcidae) on Leptospermum scoparium (Myrtaceae) from Italy and France, pp. 51-63 in Zootaxa 2543 on page 52, DOI: 10.5281/zenodo.196731