1. a Research Associate: Desert Ecological Research Unit , P.O. Box 953, Walvis Bay, 9190
2. b Department of Zoology , Rutgers University , New Brunswick, N.J., 08903, U.S.A.
3. c 7 Ingliside, 31 Howick Rd., Pietermaritzburg, 3201
4. d Box 115 Hoedspruit, E. Transvaal, 1380
5. e Division of Nature Conservation , Private Bag X209, Pretoria, 0001
6. f Physics Department , University of Cape Town , Rondebosch, 7700, South Africa
7. g 26 Malcolm Road, Dunnottar, 1593
8. h 9 Alexandra Avenue, Oranjezicht, Cape Town, 8001
9. i 108 Pretorius Street, Hatfield, Pretoria, 0083
10. j Department of Zoology , Rand Afrikaans University , P.O. Box 524, Johannesburg, 2000, South Africa
11. k Breadstone Lodge, Breadtone, Berkeley, Gloucestershire, U.K.