Well, the etymology is not clear. Jastrow lists חִיפּוּשִׂיתָא beetle with a Sin, deriving it from the root חפשׂ to search together, which may then have been borrowed into Arabic with n-insertion as خُنْفُسَاء ḵunfusāʾ. But Sokoloff writes it חפושׁיתא as can be expected from the Middle Hebrew word, connecting it with Syriac ܚܲܒܫܘ̣ܫܬܵܐ [ḥabšušto] scarabee. And Hoch gives a syllabic Egyptian ʾ=p=ši₂=ya=t beetle, grasshopper. And it is unclear whether there were two proto-semitic roots (ḥVbVš- and ḥVinpVš) or just one. I find those critters quite difficult in their semitic development.