Note:  Do not rely on this information. It is very old.

Cuckoo Spit

Cuckoo Spit, the name of the white, frothy mass that surrounds the larva of one of the Frog-hoppers (q.v.) or Cercopidae. It occurs most commonly on grass and green bushes. The larva and adult are both yellow in colour, and the latter has two pale bands on the fore wings.