44 



effect of birds, especially titmice {Pandee), in keeping in check 

 certain coccid pests in Britain. 



Sir D. Morris, replying to a question, stated that sulphur 

 had been used in the W. Indies against attacks of Eriophyes 

 gossypii, but that its use had been discontinued, as the cost of 

 the sulphur was greater than that of the labour required to collect 

 the infected leaves of the cotton plants. In closing the discussion, 

 he referred to the work previously done in the W. Indies by Mr. 

 Maxwell Lefroy, and to that now being done by Mr. Balloü 

 and other entomologists. 



P. Speiser read a paper on behalf of J. Dewitz entitled : 

 Die Physiologie in der Schädlingsforschung. 



The author dealt with the disproportion in the sexes of the 

 specimens of Lepidoptera attracted by light, the influence of 

 external and internal factors on the bionomics of insects, and the 

 physiological effect of insecticides (cf. Vol. II., p. 234). 



V. I. Kellogg expressed his appreciation of the paper, 

 but no further discussion took place. 



R. StewartMacDougall's paper on " Heieropteraa.nà Thrip- 

 idcB as apple enemies" was withdrawn, and the meeting then 

 rose. 



