Afilns. DIPTERA. 229 



probofcis, for which reafon it ought not to be 

 taken without precaution. 



Many fpecies of them are not uncommon in 

 watry meadows, where they very much in- 

 commode the horfes and cattle. 



Its larvas, or chryfalis have not been defcribed 

 that I know of. 



P3 



Genus 



