The fourth plague that God sent to Egypt prior to the IsraElite exodus was a countrywide infestation of biting flies. The Greek word for them is kunomuian, which implies (and is often translated as) dog flies.
And in other Bibles, they are called gadflies.
Unfortunately, both of those terms (dog fly and gadfly) are unfamiliar to most readers in the Americas. However, when researching the term dog fly, we found that this is just another name for the common stable fly, which bites like a horsefly but is about the size of a housefly.
That is why we have settled on this term.
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