St Andrew Cross Spider?

I have seen quite a no. of St Andrew Cross Spider (SACS) species but this one which I spotted yesterday at Lower Peirce Reservior is quite different from them in that it has a large fat adbomen, easily 3 times bigger than the normal SACS.  My first encountered of this beautiful SACS was more than 3 years ago at Segar Road.

This SACS species is relatively difficult to spot as it likes to build its web lowerly on short grasses usually about 10cm from the ground.  The most attractive part of this species, in my opinion, is the nice pattern and striking yelllow of its fat abdomen.