PRESIDENT S ADDRESS. 



11 



together with a paper treating of the emergence of dragonfly 

 larvye from the egg, with special reference to the problem of 

 respiration, and another recording important conclusions respect- 

 ing the radial and zygopterid sectors in Odonata and the forma- 

 tion of bridge-veins, are contained in the Proceedings for 1916. 

 In addition to these, three other important papers, including one 

 upon fossil insects from Queensland, have been completed and 

 submitted for publication. These will be taken in their turn 

 during the coming Session. Mr. Tillyard purposes continuing 

 his work on the Odonata and Neuroptera; and taking up also 

 the study of the Orders Perlaria and Trichoptera on similar 

 lines. In January, Mr. Tillyard visited Cradle Mountain, in 

 N.W. Tasmania, and discovered there a remarkably rich alpine 

 fauna, the greater part of which is new to science. The ancient 

 Orders of the Trichoptera (Caddis-flies) and Perlaria (Stone-flies) 

 are dominant in this region; about thirty new species of the 

 former and twelve of the latter were obtained, besides a number 

 of new and rare Lepidoptera and Diptera. Mr. Tillyard's book 

 on "The Biology of Dragonflies" was published early this year 

 by the Cambridge University Press. The volume is one of the 

 Cambridge Zoological Series, edited by Dr. Shipley. Copies 

 have not yet reached Australia, but may be expected in April or 

 May. 



Dr. H. S. Halcro Wardlaw, Linnean Macleay Fellow in Physi- 

 ology, has completed his first year's work. An important paper 

 on the change of composition of alveolar air after the stoppage 

 of normal breathing, was read at the last Meeting; and will be 

 found in the concluding Part of the Proceedings for last year. 

 Dr. Wardlaw has also been engaged upon a very promising 

 investigation of the range of variation of the composition, and of 

 the values of certain physical properties of the milks of individual 

 cows. 



I have now the pleasure of making the first public announce- 

 ment of the Council's reappointment of Dr. J . M. Petrie, Mr. E. 

 F. Hallmann, Mr. R. J. Tillyard, and Dr. H. S. H. Wardlaw to 

 Linnean Macleay Fellowships for a period of one year from 1st 



