DCHP-1 Online
bull-fly 
n. any one of several species of horsefly, especially Chrysops.
See also: bulldog fly
- 1924 Not much trade these wintry days and if customers come, they'll stick around like summer bull-flies.
- 1958 "Summers, there was . . . those big, furry mosquitoes, the black no-seeums, the bull flies."
- 1924 Not much trade these wintry days and if customers come, they'll stick around like summer bull-flies.