[House dust mites in bed dust and on the body].

In the urine of a ten-year-old girl mites of the species Tarsonemus minusculus (Can et Fanz.) and Cheyletus eruditus (Schr.) were found. A following examination of the bed dust from the bed of the child produced yet two further species of house dust mites Dermatophagoides pteronyssinus (Trouess) and Tyrophagus putrescentiae (Schr.). The demonstration of Tarsonemus minusculus in this area is new, just as the hitherto unknown male of this species.