PART IT. Mr. RITCHIE observed that of course, one might get considerable leaf cast due to debility and with no Hemileia present. Mr. SIMPSON said that in regard to coffee cultivation, Uganda was divided into two distinct zones—those at an altitude of from 5,000 to 6,000 feet, where Arabica was grown, and the lower arcas at about 4,000 feet where Robusta now was being grown. They were now returning the natives to the Sesse Islands, whence they had been removed owing to the incidence of sleeping sickness, and those islands were now being developed agriculturally entirely as areas for the growing of Robusta coffee. THE CHAIRMAN (Mr. Holm) was much concerned in regard to the possibility of the spread of Stephanoderes hampei from Uganda, and asked if Uganda was making any attempt to prevent such spread to new districts, and, if so, if they entertained any hopes of being successful. He hoped that the Entomological Section of the Confer- ence would discuss the question of preventive measures in regard to the spread of this coffee pest in East Africa.* He expressed his appreciation of the valuable paper which Mr. Maitland had just read. Mr. HARGREAVES said that in Uganda, Stephanoderes hampei occurred in all coffee areas, and it had recently appeared in the Elgon district. = He was doubtful whether it would be possible to exercise complete control over this pest, and it appeared probable that in the long run it would spread into Kenya in the Elgon area. The incidence of attack seemed to be somewhat reduced in cases of Robusta coffee. He did not think that there was any danger of introduction of the pest from seeds. if they were properly inspected and fumigated. Mr. ANDERSON said that in Kenya they were much concerned with regard to the spread of this pest from Uganda, particularly in view of the fact that coffee cultivation on the eastern slopes of Mount Elgon was developing rapidly. Mr. HARGREAVES was afraid that they could hold out little hope that the pest would not spread. THE CHAIRMAN (Mr. Holm) asked if they were considering if it were possible to assist, by artificial means, parasites to render natural control of this pest. Mr. HARGREAVES thought, personally, that the damage done by Stephanoderes hampei on Arabica coffee would, to some extent, be reduced if a small percentage of Robusta trees were planted among the Arabica. This was merely a theory of his own, and it had not yet been tested. An experiment for this purpose had been commenced. In reply to Mr. Holm, Mr. Hargreaves further stated that he had been endeavouring for six years to obtain data of use in devising control measures for the pest, but so far he had been unable to evolve a successful method. Mr. Kirby then proposed a vote of thanks to Messrs. Trench and Maitland for their excellent papers. ¥ See Part IV., Chapter III. 64