In the uncertainty of identifying these four creatures, it has been suggested that some of the names may belong to locusts in an imperfect state of…

The locust after his kind. —Of the four species of locusts here specified as permitted to be eaten, this one called arbe …

[Even] these of them you may eat ,
&c] The four following ones, which seem to be no other than four sorts of locusts…

These laws seem to have been intended,

1. As a test of the people's obedience, as Adam was forbidden to eat from the tree of knowledge…