Hot answers tagged rashi
"Rav D.Z Hoffman raises the difficulty that all insects have six legs, not four. He explains that they have 4 legs that are used for simple walking, while the other two are used for jumping." (From English Artscroll Chumash) Therefore in the context of the question, the midrash is stating that if they had "5 legs" specifically for walking, (i.e. 7 in total) ...
Only top voted, non community-wiki answers of a minimum length are eligible