CONTEXTS 



VOLUME XXXII. 



No. 1. Factors in Variation, by Heber A. Long- 



m.an. F.L.S. Issued 24th April, 1920. .. 1 



No. 2. Notes ok the Chalcid Parasites of 

 MuscoiD Flies in Australia, by Prof. T. 

 Harvey Johnston, M. A., D.Sc and M. J. 

 Bancroft, B.Sc. Issued 28th April, 1920. 19 



No. 3. Experiments with Certain Diptera as 

 Possible Transmitters of Bovine 

 Onchocerciasis, by Prof. T. Harvey John- 

 ston, M.A., D.Sc, and 21. J. Bancroft, 

 B.Sc. Issued 30th April, 1920 . . . . 31 



No. 4. Notes on the Occurrence of Petroleum 

 IN Queensland, by J. B. Henderson, 

 F.I.C. Issued 1st June, 1920 .. .. o8 



No. 5. The Life History of Habronema in Re- 

 lation to Musca Domestica and Native 

 Flies in Queensland, by Prof. T. Harvey 

 Johnston, M. A., D.Sc, and M. J. Bancroft, 

 B.Sc Issued 1st June, 1920 .. .. 61 



No. 6. On the Occurrence of Cyanophoric 

 Glucosides In the Flowers of some 

 Proteaceae, by F. Smith, B.Sc, and C. T. 

 White, F.L.S. Issued 1st June, 1920 .. 89 



No. 7. New or Little Known Australian Crane- 

 Flies (Tipulidae. Diptera), by Charles P. 

 Alexander, Ph.D. (Cornell). Issued 24th 

 Juno, 1920 92 



No. 8. The Origin of Black Coatings of Iron and 

 Manganese Oxides on Rocks, by W. D. 

 Francis. Issued 6th August, 1920.. .. 110 



No. 9. Contributions to the Orchidaceous Flora 

 of Queensland, by R. S. Rogers, M. A., 

 M.D., and C. T. White, F.L.S. Issued 14th 

 Sei-ttember, 1920 117 



