The species is found in the vicinity of Auckland, Tauranga and the Marlborough Sounds in New Zealand. As it is typically found in modified habitats near portcities, it is unclear whether the species is endemic or introduced to New Zealand, and it is suspected to be a species that originated in Australia. The host species of B. thorpei is unknown. Other species of Bocchus parasitise members of the family Issidae, however no species within this family have been recorded in New Zealand.