Advenathrips inquilinus: A new genus and species of social parasites (Thysanoptera : Phlaeothripidae)

Advenathrips inquilinus gen. et sp. n. produces colonies within pre-existin g colonies of an undescribed species of Dunatothrips Moulton on Acacia aneu ra, the widespread mulga trees of central Australia. The Dunatothrips adult s construct domiciles by sewing together terminal phyllodes of their Acacia host, and within these domiciles they raise their brood in subsocial colon ies. Advenathrips inquilinus enters established Dunatothrips colonies, then lays eggs and raises its brood among those of its host,apparently without disrupting or displacing the host colony. This social parasitic, inquiline behaviour differs from that of previously described kleptoparasitic thrips species that are common in the domiciles of various thrips species on Acaci a trees in Australia.