Lunar Rhythm in the Emergence of an Ephemeropteran
IN a paper published in 1927, Hora1 suggests that the swarming of some Ephemeroptera is related to the lunar cycle. Evidence has been obtained which suggests that Povilla adusta Navas, a mayfly widely distributed in Central and Southern Africa, shows such a rhythm of emergence in Uganda. The interest of this lies in the fact that very few examples are known of lunar rhythms in non-marine animals (see Gaspers2).