Frederick V. Theobald, M.A., vice-principal of the Southeastern College of Agriculture at Wye, Kent, England; professor of economic entomology and zoology; author of the five-volume monograph of the Culicidæ of the world, issued by the British Museum of Natural History, the first two volumes of which were published, with a volume of plates, in 1901, and afforded a convenient method for the determination of species to the early workers in the transmission of disease by insects.