Midrash su Levitico 11:20

7) (Vayikra 11:20): "All creeping things that fly, which walk on four are detestable to you." I might think that all are forbidden. It is, therefore, written (Vayikra 11:21): "Only this may you eat of all creeping things that fly, which walk on four, etc." I might think that all are permitted; it is, therefore, written (Vayikra 11:22): ("These of them you may eat:) the arbeh [the locust] (after its kind), and the salam [the bald locust] (after its kind), and the chargol [the cricket] (after its kind), and the chagav [the grasshopper] (after its kind.") This tells me only of these alone. Whence do I include others? From (the repetition) of "lemineihu." How so? I derive it from what is mentioned, viz.:

8) Just as the arbeh, which is mentioned, has four legs and four wings and jointed legs (for leaping), and its wings cover most of it, so, all of this kind are permitted. R. Yossi says: (In addition,) it must lend itself to the name "chagav" (grasshopper). R. Elazar b. R. Yossi says (Vayikra 11:21): "that which has joined legs" — even though it does not have them yet, but is destined to grow them.

On the fifth day He caused the waters to bring forth abundantly all kinds of locusts, male and female, clean and unclean. By two signs are they declared to be clean: by their long legs with which they jump, and by the wings which cover the entire body, such are clean. Such (living things) as were brought forth from the water, namely, fish and locusts, are (eaten) without (being subject to the laws of) Shechiṭah (with the ritual slaughtering), but the bird cannot be eaten unless (it be killed) by (the method of) Shechiḳah. Such creatures which have been created from the earth || have their blood covered with earth, and such as have been created from the water must have their blood poured out like water.