202 Sciara tritici, Coq. A Fhj Injurious to Seedling* 



largely destroyed by the sterilization of the soil by heating which 

 was tried experimentally for some time. This method, however, was 

 abandoned as it was not found satisfactory for other reasons. 



It is suggested by Mr St Quintin (see above) that the species in his 

 case was introduced from the United States in Osmunda fibre. In 

 our houses there were a few orchids growing in Osmunda fibre and it 

 is possible that they might have come in this from some other locality 

 in England. It is probable that it will be found widely distributed 

 in greenhouses in this country. 



C. B. W. 



The John Innes Horticultural Institution, 

 Merton, Surrey. 



November, 1915. 



