Common grass blue (Zizina labradus) (male)
Moreliaman – My understanding of Lycaebudae is: they are taken in by ants – but normally eat vegetation (mistletoe) with exception of the ant blues. The experts have no idea what the ant blues eat – all they know is their caterpillars live their entire life in an ants nest.
When I was a kid I use to catch the lava and raise them to butterflies – I would search the bush for the ants, then place a piece of wood with holes to simulate a good home. Often I would get caterpillars or pupa. I raised the caterpillars on apple as a change of mistletoe plant may kill them (Side note – A good mistletoe substitute is apple).
You are right the adults will only lay eggs where ants live – Each butterfly species will work with a different type of ants – their caterpillars smell like that type of ant.
If you are seriously want to breed one of the butterflies that require ants then:
Find out what they eat (Often mistletoe) – in the case of mistletoe grow a host tree – in spring get some mistletoe berries – place seeds on a low hanging branch of your chosen tree (Mistletoe will often grow on introduced deciduous trees like plums). I am happy to talk a little about mistletoe.
Once you have the food source then source out the ants – I would do this by cutting a branch and attaching to the host tree. (Note you will have to feed the ants – most probably on agar, honey and sugar.) Each blue takes a different ant or even a different ant subspecies.
That said – I suggest the butterfly in the photo is one of the common grass blues (Zizina labradus) – see
http://www.geocities.com/brisbane_blues/CommonGrassBlue.htm
As their name suggests – their caterpillars eat grass (Clover). I doubt they have interaction with ants as previously mentioned.
Side note: NEVER take any living or non-living object from a national park or nature reserve and many of the blues are now protected species. As such it is illegal to catch, breed or interfere with protected insects.