OZ EXPERIMENTS WITH CERTAIN DIPTERA. 



were infected with Habronema spp. but A. muscarum was 

 not found. 



(3) Wallaby dung, chiefly of Macropus dorsalis. 

 Pellets collected in various parts of several different scrubs 

 in the neighbourhood of Eidsvold, were moistened with 

 water and either flies allowed to larvipo-sit on the material 

 or young larvae were transferred to it from cow dung. Thirty 

 two flies bred in this way were examined, but no infection 

 had occurred. 



(4) Bird dung. The excrement of various water birds 

 was collected along the margin of the river. Flies could 

 but rarely be induced to larviposit in this material, but 

 young larvae transferred to it from cow dung grew well. 

 Thirty-one flies bred in this manner were examined but 

 the presence of A. muscarum was not detected. 



(5) Fowl dung. Eight pupae, the larvae of which had 

 been raised partly on fowl dung, were examined, but no 

 infection was observed. Nine house flies bred from the 

 same source were likewase free from parasites. 



M. vetuslissima. 



(1) Coio dung. Thirty -three' flies bred from this 

 material were examined with negative results. 



(2) Horse dung. Sixty-flies bred therefrom all proved 

 to be infected only with Habronema spp. 



M. terrce-regince. 



'D Goto dung. Forty-one flies bred from cow dung 

 were examined and found to be free from any infection. 



(2) Horse dung. Ten flies bred from horse dung were 

 all infected with Habronema spp. alone. 



Musca Jiilli. 



(1) Wallaby stomach. Thirteen flies bred in the food 

 material from the stomach of a scrub wallaby, M. dorsalis, 

 proved to be free from any infection. 



Agamonema fannice n. sp. 

 (Text.-fig 16). 

 This tiny active parasite was first met with in a specimen 

 of M. vetustissima dissected in December, 1918. The worms 



