from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A jumping plant louse of the family Psyllidae, of many species.
from the GNU version of the Collaborative International Dictionary of English
- n. A jumping plant louse of the family Psyllidæ, of many species. That of the pear tree is Psylla pyri.
from The Century Dictionary and Cyclopedia
- n. The popular name of the homopterous insects of the family Psyllidæ, resembling in general appearance the aphides or true plant-lice, but distinguished by the difference in the fore wings, which have a distinct marginal vein.
Sorry, no etymologies found.
The most serious are: (1) the rust or blight, for which there is no cure but carefully pulling and burning the plants as fast as infested; (2) the blackberry-bush borer, for which burn infested canes; and (3) the recently introduced bramble flea-louse, which resembles the green plant-louse or aphis except that it is a brisk jumper, like the flea-beetle.