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Among the people listed in the Mishna as deserving the punishment of malkot (lashes) are people who eat animals that are not kosher, including animals that were killed improperly, those that were sick when they were slaughtered, as well as insects and other creepy-crawly creatures.
The most basic prohibition appears in Sefer Vayikra (20:25) lo teshaktzu et nafshoteikhem (“you shall not make your souls detestable”). While the passage in the Torah clearly relates to eating shekatzim – insects and similar disgusting creatures – some of the Sages applied the prohibition to other settings, as well.