Ephydra (efidra)

[NL. (Fallen, 1810), Gr. έφυδρος, living on the water, The waters of Lake Mono in California swarm with millions of E. californica, which drift in immense quantities along the shore. The larvæ are used for food by the Indians, under the name of koochahbee; ahuatle is the similar food prepared from E. hians, a Mexican species which swarms in Lake Tezcuco. The described North American species are 11 in number. Also, improperly, Ephidra.