BY T. HARVEY JOHNSTON AND M. J. BANCROFT. il 



M. domestica. Forty-six (2(3 females and 20 males) 

 were examined — 36 (21 females and 15 males) being infected 

 with Habronema. In 26 cases a record of the species was 

 kept, H. muscce occmring alone 18 times, H. megastoma 

 alone once, while l)oth species were present together 7 times. 



