Ankle and heel bones (5)
(Other definitions for tarsus that I've seen before include "biblical city" , "St Paul was born there" , "The seven bones of the upper foot and ankle" , "Arrangement of bones" , "saint's birthplace" .)
(Other definitions for tarsi that I've seen before include "Foot bones" , "Parts of skeleton" , "Bones of the ankles and heels" , "collections of bones?" , "Ankle bones" .)