To the Editor:
—Our studies have revealed the mouth armature of the maggot to be as follows:
The head. The only portions of the head which can be recognized externally are the maxillae, separated on their ventral surface by the mouth and the prestomal and discal sclerites, and on their dorsal aspect by the epicranium.
The maxillae. These organs form the largest portion of the head, and each consists of two parts separated by a slight circular sulcus, a proximal and a distal portion. The distal portion is hemispherical and has two short conical sensory papillae at its extremity. The proximal portion is cylindric and on its ventral and outer surface presents the stomal disk in front of which is a sac in which the great hooks lie when retracted.
The mouth. This presents a triangular orifice between the proximal portions of the maxillae; the apex of the triangle is