This Egyptian queen didn't make an asp of herself, but she did use an asp snake to kill herself in 30 B.C.
... had 
plans to degrade Cleopatra by making her walk as a captive in his triumph but 
could ... and committed suicide by letting an Asp bite her, however, she was killed 
by... [DOC] [TLE] Cleopatra "Was Killed by a Cocktail