有喝水的螞蟻嗎?

the ants in my house always kill themselves by running into the water. when leave a cup of water on the table for a day, loads of ants crawl in the cup.......they look like drinking the water but most of them die.......actually some of them seem like swimming=.=........when i pour some water on the table, they also come and "drink" the water and of course some of them died.......this is really strange....is there any way to get rid of the ants????