Abstract
Females of the Trichocera (Trichocera) rectistylus species group have been found to profoundly differ from those of other Trichocera Meigen, 1803 by the structure of their terminalia. The female terminalia are described for T. (T.) altipons Starý, 1998, T. (T.) basidens Starý, 1998, T. (T.) polanensis Starý, 2002 and T. (T.) rectistylus Starý, 1998. In addition, another species of the rectistylus group, T. (T.) villosa sp. n. (Czech Republic), is described from both males and females.