Theater at Bates will stage seven performances of Constance Congdon's comedy "Tales of the Lost Formicans" at Bates College Friday, Nov. 6, at 8 p.m.; Saturday, Nov. 7, at 8 p.m.; Sunday, Nov. 8, at 2 p.m.; Thursday, Nov. 12, at 8 p.m.; Friday, Nov. 13, at 8 p.m.; Saturday, Nov. 14, at 8 p.m.; and Sunday, Nov. 15, at 2 p.m.