1) Arthropod genus 2) Bombardier beetles 3) Genus brachinus 
Brachinus is a genus of ground beetle native to the Palearctic, the Near East and North Africa. It contains the following species: ...
Brachinus is a genus of bombardier beetles of the ground beetle family, Carabidae. They have shorn off elytra and defend themselves by squirting a liquid which explodes audibly on contact with the air from their anus. One species, Brachinus crepitans, lives in Britain, mostly in chalky districts in the south of the country.
[n] - bombardier beetles
genus Brachinus noun bombardier beetles