135 
ted,  and  that  is  by  no  means  unusual  It  is 
commonly  found  in  sheep  from  the  the  River 
Plate  and  the  larvae  are  well  known  to  the 
people  working  at  the  slaughter  houses  who 
however  know  nothing  of  the  flies. 
BRAUER  included  Brazil  in  the  habitat 
of  Oestrus  ovis.  He  was  perhaps  referring  to 
Rio  Grande,  as  the  occurrence  in  São  Paulo 
and  Rio  was  not  noticed  before.  1  had  no 
native  specimen  in  my  collection.  Nowadays 
however  it  must  be  found  in  several  places. 
The  specimen,  caught  in  Rio  proves  that 
this  fly  is  not  confined  to  the  cooler  moun¬ 
tains,  but  also  invades  the  tropical  regions. 
