112 T. H. JOHNSTON AND J. B. CLELAND. 



grains of rice were found embedded in the subcutaneous 

 tissue of the necks of these two birds. These were easily 

 shelled out and then proved to be small larval worms. In 

 May, 1910, about twelve miles south of Adelaide Pomatos- 

 tomus super ciliosus, Vig. and Horsf., and Aphelocephala 

 leucopsis, Gould, were shot near the same patch of scrub 

 together with several other small birds and a hawk. In 

 the Pomatostomus and Aphelocephala were a number of 

 larval worms similar to those in the North Western birds, 

 distributed in the subcutaneous tissues of the neck and 

 thorax, sometimes being more deeply placed between the 

 muscles especially those of the chest or even within the 

 muscles. In November, 1910, two specimens of Pomatos- 

 tomus frivolus, Lath. (syn. P. temporalis, Vig. and Horsf.) 

 together with several other birds were shot near Collar- 

 enebri in the north of New South Wales. Both the 

 Pomatostomi showed scattered larval worms in the same 

 situations as in the birds obtained near Adelaide. The 

 country here was open black soil plains with a few scattered 

 gum trees. We have recently received from Mr. J. W. 

 Mellor through Mr. L. Harrison, a number of similar para- 

 sites from the subcutaneous tisssue olHylacola pyrrhopygia, 

 Vig. Horsf., shot near Adelaide. 



It will be seen from the foregoing, that this small 

 parasite is widely distributed geographically in Australia, 

 having been obtained at three places sundered by many 

 hundred miles from each other. Lines joining these three 

 points would form roughly a triangle with its apex in 

 Southern Australia, one angle in North Central New South 

 Wales, and the other angle in North West Australia. The 

 types of country of these three localities are absolutely 

 distinct from each other, so that no particular type of 

 country can have much influence on the development of 

 the parasites. It is a significant fact that in each of 





