buffalo gnat (English spelling) buffalognat

...General term for insects belonging to the family Simuliidae in the suborder Mesocerca of the order Diptera. The English name is black fly or buffalo gnat. The standard Japanese name is buyu, but there are few regions where it is actually called buyu. In eastern Japan, it is often called buyo, and in western Japan, it is often called buto.

*Some of the terminology that mentions "buffalo gnat" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…双翅目長角亜目ブユ科Simuliidaeに属する昆虫の総称。英名はblack flyまたはbuffalo gnat。標準和名はブユであるが，実際にブユと呼んでいる地方は少なく，東日本ではブヨ，西日本ではブトと呼ぶ地方が多い。…

※「buffalo gnat」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報