Surfactant in Apical Drop of Eggs of Some Culicine Mosquitoes1

Abstract
The apical drop found on the posterior end of eggs of species of Culex and Culiseta, described in the recent literature as being water, exhibits high surface activity and chemically seems to be an ester of several fatty acids. The apical drop appears to play a role in returning upset egg rafts to their normal position on the water surface.