23 



Dr. J. C. MOTTRAM. 



An Experimental Determination of the Factors which cause 

 Patterns to appear conspicuous in Nature. 



The following Papers have been received : — 



Miss Olive C. Lodge. 



Some Enquii-ies into the Question of Baits and Poisons for 

 Flies ; being the Report on Experimental Work carried out 

 during 1915 for the Zoological Society of London. 



Miss Winifred H. Saunders. 



1. Report on Investigations into Stable Manure to check 

 the Breeding of House-Flies, made during the Year 1915, 

 for the Zoological Society of London. 



2. Report on Trials for catching, repelling, and extermi- 

 nating Flies in Houses, made during the Year 1915 for the 

 Zoological Society of London. 



3. Report on some Observations on the Life -History of 

 the Blow-Fly and of the House-Fly, made from August to 

 September 1915, for the Zoological Society of London. 



The Publication Committee desire to call the attention of 

 those who propose to offer Papers to the Society, to the great 

 increase in the cost of paper and printing. This will render it 

 necessary for the present that papers should be condensed, and 

 be limited so far as possible to the description of new results. 



Communications intended for the Scientific Meetings should 

 be addressed to 



P. CHALMERS MITCHELL, 



Secretary. 



ZooLOoticAL Society of London, 

 Regent's Park, London, N.W. 

 April 25th, 1916. 



