PROCEEDINGS, 1'917, PART 



CONTENTS. 



PAGES 



Presidential Address deli^'ered at the Forty-second Annual Meet- 

 ing, March 28th, 1917, by Alex. G. Hamilton l-'Jo 



On the Morphologj^ of the Caudal Gills of the Larvae of Zygop- 

 terid Dragonfiies, Introduction, Part i. (General Morpho- 

 logy), and Part ii. (Studies of the Separate Types). By R. 

 J. Tilly ARD, M.A., B.Sc, F.L.S., F.E.S., Linnean Macleay 

 Fellow of the Society in Zoology. (Plates i.-vi., and 32 text- 

 tigures ) ... ... ... ... ... ... ... ... .S 1 - 11 2 



Hydrocyanic Acid in Plants. Part iii. By James M. Peticik. 

 D.Sc. , F.I.C. , Linnean Macleaj' Fellow of the Society in 

 Biochemistry ... ... . .113-117 



The Chemical Investigation of some Poisonous Plants of the N.O. 

 Solanacea*. Part iv. The Chemistry of the Duboisias. By 

 James M. Petrie, D.Sc, F.I.C, Linnean Macleay Fellow 

 of the Society in Biochemistry ... ... ... ... ... 1 1 S- 1 3,") 



The Chemical Investigation of some Poison(jus Plants of the N.O. 

 Solanacete. Part v. The Alkaloids of Diiboisia Leichhardfii 

 F.v.M. By James M. Petrie,, D.Sc, F.I.C, Linnean 

 Macleaj^ Fellow of the Society in Biochemistrj^ 137-14:5 



The Percentage of Carbon Dioxide in Expired Alveolar Air.. By 

 Ethel C Pinkerton, B.Sc, Government Research Scholar 

 in the University of Sydne3^ ... ... ... ... ... 14»>-1<)1 



Contributions to our knowledge of Soil-Fertility. X<j. .\\ . The 

 Action of certain Micro-organisms upon the numbers of Bac- ~^ 

 teria in the Soil. By R. Greig-S.mith, D.Sc, Macleay 

 Bacteriologist to the Society ... ... ... ... ... I(j2-li)() 



The Wing-Venation of Lepidoptera (Preiiniiiiar\- l\e]>)rt). }iy 

 R. J. Tillyard, M.A., B.Sc, F.L.S.. F.E.S.. Linnean 

 Macleay Fellow of the Society in Zoology. (Seven text- 

 figures) ... ]()7-174 



Mesozoic Insects of Queensland. Xo. 1. P/anipemna. Tridiojit> r'l. 

 and the new Order Protomtcoptiiia. By R. J. /Tillyard. 

 M.A., B.Sc, F.L.S., F.E.S., Linnean Macleay Fellow of the 

 Society in Zoology. (Plates vii.-ix., and seven text-figures). 17o-2(X) 



Descriptions of two new Tiger-Beetles from the Northern Terri- 

 tory. By T.G. Sloaxe. [Title] 201 



Australian Neuroptero.. Part iii. By-EsBEN-PKTER!SE,N. ( t'orn- 



municatedhy W. W. FroggaU, F.L.S.). (Plates x.-xv.) ... 2(I3-211» 

 Hon. Treasurer's Financial Statement and Balance Sheet . . . 2.~)-29 



Elections and Announcements ... 80, 1 36 



, Notes and Exhibits .'' ... ... 201 



