Points from Foregoing Letters | Nature

CERTAIN strains of mosquitoes (Culex pipiens) originally found on the Continent can lay fertile eggs without a previous meal of blood and have been termed ‘autogenous'. J. F. Marshall and J.

Staley bring evidence that certain man-biting mosquitoes in Great Britain are females of such autogenous strains: they describe the morphological differences between autogenous mosquitoes

from various countries and the original non-autogenous variety and suggest that the specific name C. domesticus be revived for the autogenous strain.

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