mE LIFE HISTORY OF HABRONEMA IN 



RELATION TO MUSCA DOMESTIC A 



AND NATIVE FLIES IN gUEENSLAND. 



IBy Professor T. Harvey Johnston, M.A., D.Sc. ; and 

 M. J. Bancroft, B.Sc, Walter and Eliza Hall Fellow 

 in Economic Biology, University, Brisbane. 



(With 7 Text-figures). 



>{Bead before the Royal Society of Queensland.SlstMeiy, 1920). 



The first observer to call attention to the occurrence 

 of nematodes in domestic flies was Carter, who, in 1861, 

 reported the presence in Musca domestica of worms which 

 he named Filaria muscce. A little later the species was 

 transferred by Diesing to the genus Hahronema. Though 

 a few European workers experimented with the parasite 

 with a view to elucidating its life history, it remained for 

 Ransom (1911, 1913) to prove that the worm was the 

 larval stage of Habronema muscce, a parasite of the horse's 

 stomach. He gave an excellent account of all stages 

 from the egg to the adult. 



In 1912, one of us (Johnston 1912, p. 76) recorded 

 the presence of H. muscce in Musca domestica in Sydney 

 -and Brisbane, and in Stomoxys calcitrans in Sydney, stating 



