Entelopes glauca Guérin-Méneville, 1844 Borneo; Sumatra; Java; W. Malaysia. Your specimen is female.
Vives and I had a note about this species in a recent paper.
Vives, E. & D. Heffern. 2012. Description and notes on Oriental longhorned beetles, mostly from Borneo (Coleoptera: Cerambycidae). Les Cahiers Magellanes, New Series. Andrésy. 10:1-17. 15 fig.
The male has solid dark blue elytra. The macula on the elytra of the female are very dark blue in my specimens from Borneo. Your specimen has macula which look black.