The presence of acid mucopolysaccharides in viscous extrusions from the labellar and tarsal chemosensilla of Phormia regina (Meig.).

Mucopolysaccharide substances are present in the shafts of both tarsal and labellar chemosensilla of Phormia. These substances are extruded at the tip of the chemosensilla. A certain amount of mucopolysaccharides can also be observed on the outer surface of the tarsal hair wall at various points along the hair shaft. The influence of mucopolysaccharide substances on hair responsiveness to external stimuli is discussed.