Calendar: 1973-1974 Page 460

Annual Report of the Delegacy lxxxvii visited the National Institutes of Health Bethesda Maryland the University of Indiana the Massachusetts Institute of Technology Cambridge Mass and Princeton University New Jersey He broad- cast about bats on the World Service Dr Κ Lyons gave research seminar to the Department of Zoology University College of Wales Aberystwyth Dr Stoddart addressed the Zoological Society of London in October and read paper on recruitment and sex ratio in population of Arvicola terrestris to the Symposium Theriologicum II in Brno Czechoslovakia Dr Sales delivered invited lectures to the Zoological Society of London Scientific Meeting the Biol course at Sir John Cass College with an extensive demonstration-practical in our own labora- tories the summer conference of the Association for the Study of Animal Behaviour on 'Selective responsiveness to stimuli' and at the Laboratory Animals Centre Carshalton Miss Smith read paper to the Postgraduate Conference in Animal Behaviour at Cambridge and assisted Dr Sales in the Biol demonstration Mr Beer and Mr Chiodini read papers on Trichuris suis infections and the chemotherapy of Babesia respectively at the British Society for Parasitology Spring Meeting at Loughborough Miss Preston read paper on immunity to Leishmania tropica at the First European Multi Colloquium of Parasitology at Rennes Members of the Department continued to play active parts in the Sc external examinations and Professor Arthur Drs Cox Cox Κ Lyons Pye and Mr Darwin were appointed to the New Board of Examiners for the Sc Zoology examination Drs Cox Κ Lyons and Pye played major parts in the organisation of the new syllabuses for this examina- tion major new development in Dr Pye's work has been the successful completion of new form of ultrasound detector this has fulfilled all expectations and steps are being taken to investigate possible commer- cial production His group has also commissioned the Biomac 1000 data processing computer The project undertaken by Third-year student MrJ Lenehan confirmed an idea that ultrasound is emitted by courting crickets and this work is to be pursued further both at King's College and Sir John Cass College Dr Hawkins received grant from the Royal Society 'Scientific