Alvea or Alvei: How To spell?

The word Alvea is misspelled against Alvei, which is plural of "Alveus"

Word ends with consecutive vowels 'EI' preceded by alphabets 'alv' is misspelled as 'EA'
Wrong Spelling:  alv-ea 
Correct Spelling:  alv-ei 
Explore spell check of Alvei to spell without errors.