a1 CSIRO, Division of Animal Genetics, P.O. Box 90, Epping, NSW 2121
a2 Department of Agriculture, GPO Box 1926, Hobart, Tasmania, 7000
a3 Department of Zoology, Monash University, Clayton, Victoria 3168
a4 CSIRO, Division of Wildlife Research, P.O. Box 84, Lyneham, ACT 2602
The European rabbit flea Spilopsyllus cuniculi (Dale) was first released on Macquarie Island in December 1968. The flea has survived and bred on the island and about 30% of the rabbits sampled from the original release area in January 1972 were flea-infested.
(Received August 30 1972)