1. a Department of Biology , Livingston College, Rutgers University , New Brunswick, New Jersey, 08903, U.S.A.
2. b Environmental Health, Columbia School of Public Health , 60 Haven Ave., New York, N.Y., 10032, USA
3. c Department of Zoology , Rand Afrikaans University , P.O. Box 524, Johannesburg, 2000
4. d Ecology and Conservation Unit, Dept. of Botany and Microbiology , University College London , Gower Street, London, Wc1E 6Bt
5. e FitzPatrick Institute, University of Cape Town , Rondebosch, 7700
6. f P.O. Box 2208, Salisbury, Rhodesia
7. g Dept. of Zoology , University of Natal , P.O. Box 375, Pietermaritzburg, 3200
8. h Ministry of Agriculture, Plant Protection Department , c/o UNDP, P.O. Box 24, Mogadiscio, Somalia
9. i 39 Armstrong Drive, Pietermaritzburg, 3201
10. j c/o 180 Anderson Str., Brooklyn, Pretoria , 0181
11. k 101 Lomagundi Road, Greencroft, P. O. Mabelreign, Salisbury, Zimbabwe