Mallee or Mallei: How To spell?

The word Mallee is misspelled against Mallei, which is plural of "Malleus"

Word ends with consecutive vowels 'EI' preceded by alphabets 'mall' is misspelled as 'EE'
Wrong Spelling:  mall-ee 
Correct Spelling:  mall-ei 
Explore spell check of Mallei to spell without errors.