These were small wrinkled 5 mm wide balls at the end of stems of a casuarina tree. At least one small branch had several of these with holes ( parasitoid ?). Most were dry but a single fresh green gall on the same branch had a knobbly surface. When dissected the gall showed several thick-walled locules. These look similar to galls seen on C.glauca induced by the gall wasp Selitrichodes.
Spotted on Casuarina (? C.glauca) in a suburban park.
This is an unusual spotting for me. I hope the genus is correct. Thanks to Neil Ross for his input. Missing John La Salle !
Lat: -37.90, Long: 145.25
Spotted on Jan 29, 2019
Submitted on Jan 30, 2019