blackfly

noun

1. any of the minute, black gnats of the dipterous family Simuliidae, having aquatic larvae.

noun plural -flies

1. a black aphid, Aphis fabae, that infests beans, sugar beet, and other plantsAlso called: bean aphid

noun

1. any small blackish stout-bodied dipterous fly of the family Simuliidae, which sucks the blood of man, mammals, and birdsSee also buffalo gnat

n.

1. Any of various small dark humpbacked flies of whom the females are aggressive biters and serve as vectors in the transmission of onchocerciasis.