Albert Barnes' Notes on the Whole Bible - Psalms 78:45
He sent divers sorts of flies ... - The account of this plague is found in Exodus 8:24. The word there used is simply “swarm,” without indicating what the swarm was composed of. The rabbis explain the word as denoting a mixture, or a conflux of noxious insects, as if the word were derived from ערב ‛ârab - “to mix.” The Septuagint renders it κυνόμνια kunomnia - “dog-fly” - which Philo describes as so named from its impudence. The common explanation of the word now is that it denotes a species... read more
Albert Barnes' Notes on the Whole Bible - Psalms 78:44
And had turned their rivers into blood - Exodus 7:20. There was properly but one river in Egypt - the Nile. But there were several branches of that river at the mouth; and there were numerous artificial streams or canals cut from the river, to anyone of which the word river might be also given. Compare the notes at Isaiah 11:15.And their floods ... - Their streams; the canals and branches of the Nile, where they usually obtained a supply of water. read more