from The Century Dictionary and Cyclopedia
- n. The larvæ of the various dipterous insects of the genus Ephydra, which inhabit the alkali lakes of western North America, and are made into edible cakes: so called by Mexican Indians and Spanish Americans. See Ephydra, ahuatle, and koochahbee.
Sorry, no etymologies found.
Nostraticists often link PIE *bʰeuh₂- to Uralic *puxi 'tree' with an underlying meaning of 'to grow up from the ground' and hence later 'to appear' and 'to become' in PIE.