The “hairs” and various types of sensilla present on the mouth parts of Schistocerca gregaria are described. The distribution of the sensilla on the clypeo-labrum, labium and theHmaxillae has been plotted in detail, and the general distribution of all types of sensilla on each of the mouth parts is described.

A comparison is made between the distribution of certain sensilla on the clypeo-labrum in first instars and adults.

The probable role of the sensilla in feeding is discussed.