Cuckoo-Spit
CUCKOO-SPIT, a frothy secretion found upon plants, and produced by the immature nymphal stage of various plant-lice of the familiar Cercopidae and Jassidae, belonging to the homopterous division of the Hemiptera, which in the adult condition are sometimes called frog-hoppers.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)