. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 7: 1994. Fig. 1. Eurodryas aurinia Rott. ab. virgata Tutt (x life size). during a 6-year period of extreme abundance of the species (1894-1899). When the population stabilized aberrations were hard to find. (R. M. Craske {pers. comm.) made similar observations during a population explosion of the species near Plaistow, Sussex in 1945/6.) The authors attributed this phenomenon to the fact that weaker, aberrant individuals would have a chance to survive to become aduUs during a period in
. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 7: 1994. Fig. 1. Eurodryas aurinia Rott. ab. virgata Tutt (x life size). during a 6-year period of extreme abundance of the species (1894-1899). When the population stabilized aberrations were hard to find. (R. M. Craske {pers. comm.) made similar observations during a population explosion of the species near Plaistow, Sussex in 1945/6.) The authors attributed this phenomenon to the fact that weaker, aberrant individuals would have a chance to survive to become aduUs during a period in which the population was increasing in size from a point far below its average towards its optimum size. This is because, during a period of increasing population size, selection would be less intensive than when the population reached its optimum level. References Berry, R. J. 1977. Inheritance and natural history. Collins, London. Ford, H. D. & Ford, E. B. 1930. Fluctuations in numbers, and its influence on variation in Melitaea aurinia Rott. (Lepidoptera). Trans. Ent. Soc. Lond. 78: 345-351. Ford, E. B. 1945. Butterflies. Collins, London. Ford, E. B. 1964. Ecological genetics. Chapman and Hall, London. Kettlewell, B. 1973. The evolution of melanism: the study of a recurring necessity. Oxford University Press. Porter, K. J. 1989. Eurodryas aurinia. In: Emmet, A. M. & Heath, J. (Eds). The moths and butterflies of Great Britain and Ireland 7(1): 234-237. Colchester, Harley Books. Robinson, R. 1971. Lepidoptera genetics. Pergamon Press, Oxford. Robinson, R. 1990. Genetics of European Butterflies. In: Kudrna, O. (Ed.) Butterflies of Europe. Volume 2. Aula-Verlag, Wiesbaden. SHORT COMMUNICATION The white-letter hairstreak in south-east London.—One the warm and muggy morning of a large Buddteja bush in Nunhead Cemetery, London SE15, attracted only a single butterfly, a rather battered white-letter hairstreak, Strymonidia w-album (Knoch). This was the first ti
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