And the magicians did so with their enchantments to bring forth lice, but they could not: so there were lice upon man, and upon beast.
All Commentaries on Exodus 8:18 Go To Exodus 8
George Leo Haydock
AD 1849
Practiced, fecerunt; the same expression as ver. 7: whence some argue, that the former were delusions, not real changes. (Haydock)
God was pleased to show here the vanity of their attempts, and the imbecility of the devil, who could not even bring a single animalcule or insect, though he had before appeared to work great wonders. (Tirinus)