BY T. HARVEY JOHNSTON AND M. J. BANCROFT. 87 



Text-figures. 



1. Mature larva of Habronema muscce (glycerin preparation) from bred 



flies. 



2. Mature larva of Habronema megastoma (glycerine preparation) from 



bred flies. 

 The succeeding figures were drawn from specimens in saline solution 



3. Young stage of Habronema from captured Musca fergusoni. 



4. Young stagb of Habronema found in a M. fergusoni which was bred 



in cow dung, and, after emergence [as an imago, was fed on 

 infected horse manuie. 



5. Habronema embryo from a M. fergusoni larva — not more than 2 days 



in larva. 



6. Habronema embryo from a M. fergusoni pupa, — not more than 9 days 



in larva and pupa. 



7. Habronema embryo from M. fergusoni pupa, — not more than 14 



days in larva and pupa. 

 Figs. 1 and 2 are to the same scale ; figs. 3 to 7 are to the same scale 

 (shown beside fig. 4). 



References to Lettering. 

 a., anus; a.o., anal ojjerculum ; b.w., body wall; t., intestine; 

 ».r., rudiment of intestine; ii.r., nerve ring; oes., oesophagus; fh, 

 pharynx. 



Literature. 

 1916 — Bull, L. B. A granulomatous affection of the horse, Habionemic 



granulomata, Journ. Comp. Path. Therap. 29 (3), 1916, 



pp. 187-199. 

 1919 — Bull, L. B. A contribution to the study of HabronemJasis, etc 



Pr. Roy. Soc. S. Austr. 43, pp. 85-141. 

 1914 — Graham-Smith, G. S. Flies in relation to disease, Non-bloodsucking 



flies. Cambr, Univ. Press, 1914. 

 1918— Hill, G. F. Relationship of insects to parasitic diseases in stock. 



Part I. The life history of Habronema m%iscce, H. microstoma 



and H. megastoma. P.R.S. Vict., 31 (1), Dec. 1918, pp.. 



11-76. 

 1912— Johnston, T. H. Notes on some entozoa, P.R.S., Q'land, 24, 1912, 



pp. 63-91. 

 1916 — Johnston, T. H. A census of the endoparasites recorded as 



occurring in Queensland. P.R.S. , Q'land, 28, 1916, pp. 



31-79. 

 1918 — Johnstfjn, T. H. Notes on miscellaneous endoparasities. P.R.S. 



Q'land, 30, 1J18, pp. 209-218. 

 1919 — .Johnston, T. H. and Bancroft, M. J. The life history of Musca 



aiistraiis Macq. and Jf. vetustisaima Walker. P.R.S. 



Q'land, 31, 1919, pp. 181-201. 



