These are bud galls on Black Wattle, which I believe are caused by Dasineura rubiformis. The species is described in Kolesik, P., Adair, R.J., and Eick, G (2005) "Nine new species of Dasineura (Diptera: Cecidomyiidae) from flowers of Australian Acacia (Mimosaceae)", Systematic Entomology 30:454-479. You can find photos on the web from south africa and portugal since this species has been released for biological control of black wattle. It was found not to affect the growth of plantation trees, but drastically reduces seed production and therefore invasiveness. Species is fairly common in Woodlands Historic Park.
Female galls on Yellow Box. Counted at least 40 on a 2m high sapling. Almost all straight sided, just a few more bulbous. The longest was 20mm. Bulbous gall in the photo is 16mm long and about 6mm diameter.
These small dry star-bursts of psyllid galls looked like rusted metal flowers stuck to the upper surfaces of gum leaves. These eruptions looked a lot "neater" than some of the galls induced by these little hemipterans.
Spotted on what looked like Silver-leaf Stringy Bark ( E.cinerea) in a reserve.
The main picture shows a dissected gall exposing larvae at various stages of development with pale pink segmented bodies and a few eggs (pic 4). The galls were about 3 to 4 mm wide, shiny and green with knobbly tips. They seemed to arise from tips of leaflets (pinnules) and involved most of the leaflet (pic 2). Several of these galls were seen on the pinnae. Pic 4 shows a developing gall on a leaflet. The larvae seemed to have segments differentiated into thoracic and abdominal segments and there appeared to be three pairs of legs (pic 6) suggesting that these were mature and close to pupation ?. I assume these are midge galls and would greatly appreciate confirmation.
- ? Austroacacidiplosis botrycephalae
Spotted on Black Wattle (Acacia mearnsii) in a nature reserve ( Glenfern Valley Bushland Reserve)
A tree laden with pendulose galls over more than 75% of its leaves. These are produced by a small scale insect (hemipteran). A busy wasp was taking full advantage by laying eggs into the deep gall chambers.
These oblong, red galls on the leaves of a Eucalyptus leucoxylon, have been identified as having been made by a sawfly, Tenthredinidae spp. Identification by Ken Walker, who said that they are very similar to those made by the Willow Redgall sawfly, Pontania proxima.