** Australian gold stocks .AXGD shed 2.6% to 12,354.7 points, their lowest since May 29

** Sub-index on track for a fourth straight session of losses

** Spot gold XAU= edged down 0.5% on Tuesday as investors monitor U.S.-China trade discussions in London GOL/

** Evolution Mining EVN.AX falls 4.1% to A$8.515, set for worst day since mid-May

** Northern Star Resources NST.AX slips 0.8% to A$20.80

** AXGD up 46.6% YTD vs 5.1% gain in benchmark index AXJO

(Reporting by Jasmeen Ara Shaikh in Bengaluru)

((JasmeenAraIslam.Shaikh@thomsonreuters.com;))