Surely it's a mimicry of the Tetraponera rufonigra ant? That ant is also known as semut selangor, or MC Ant in Malaysia :D...yes..there are people who intentionally get themselves bitten by the ants just to get a medical certificate in order to get a day off work :D.
If you would like to see more spiders, check these out:
1. Ant-mimic crab spider eating weaver ant
2. More ant-mimic spiders
3. Wonderful jumping spiders
4. Ant-mimic crab spider - mating!
5. Male red ant-mimic jumping spider
6. Tropical spiders
7. Jumping spider life cycle
8. Lichen huntsman life cycle
All images shot with a Canon 40D, Canon MPE65 1X-5X macro lens and Canon MT24EX Twin Flash with DIY Diffuser.