72 



LIFE HISTORY OF HABRONEMA. 



alone once, and both species Mere present in one flj'. 

 number of worms ranged from one to abont 2.5.* 



Details of infection : — 



The 



Bred Flies, M. vetvstissima (Eidsvold). 



Experiment I. — In August-.September, 1919. five flies 

 bred in dung from horse ■" H " were examined. All were 

 very heavily infected with Habronema, both species being 

 present. 



Experiment II. — In November, 1919, 10 flies bred 

 in dung of the same horse were examined, all being heavily 

 infected with Habronema. In one case 44 worms were 



*We have detected the presence of both species in specimens of M. 

 veiustissima collected in the vcinity of horsedung. Melbourne Zoological'. 

 Gardens, April. 1920, and forwarded to us by the Director, ]\Ir. D. LeSouef- 

 Two infected flies weie found amongst thirty examined. 



