Female mate choice has often been proposed to play an important role in cases of rapid speciation, in particular in the explosively evolved haplochromine cichlid species flocks of the Great Lakes of East Africa. Little, if anything, is known in cichlid radiations about the heritability of female mating preferences. Entirely sympatric distribution, large ecological overlap and conspicuous differ...

Sir,?Major YVoolley's excellent article on Convict marriages in the Andamans in your March number does not appear to have aroused the comment?favourable or the reverse?which I anticipated and which it deserved. It is, however, of great interest to all those who have at heart the improvement of the criminal in the present and his disappearance in the future. As lie says, it is rather a shock to ...