Haemophilus vaginalis type strain 594 and four other reference strains were studied through a variety of biochemical and staining reactions to determine a more appropriate taxonomic position. Previous studies had shown that this species requires neither X nor V factors, nor any other coenzyme-like substances for growth. The strains grew on 0.01% potassium tellurite medium, in 0.01% potassium cyanide, and displayed metachromatic areas when stained by Albert‗s method. They were differentiated from unclassified vaginal diphtheroids by colony morphology, sensitivity to hydrogen peroxide, lack of a catalase, and fermentation of particular carbohydrates. The authors conclude that the suggestions of Zinnemann and Turner should be adopted and that the bacterium be reclassified as Corynebacterium vaginale. A new description of the species is presented.