The honeybee (Apis mellifera) tentorium, primarily an endoskeletal framework for support of the cranial wall and muscle attachment, comprises a pair of anterior tentorial arms, a pair of posterior tentorial arms, a non-rigid pair of dorsal tentorial arms, a posterior transverse tentorial bridge, and a pair of posteroventral tentorial arms that parallel the bridge above. Study of the tentorium revealed that all arms of this structure and the bridge are cannular (hollow) or tubular. The tips of the dorsal tentorial arms were found to be highly modified, porous and sandwiched between the ocular lobe and the antennal nerve. What appeared to be a neuron bundle was found on the outer lateral side of the anterior tentorial arm near the anterior tentorial pit. The cannular nature of the tentorium and its structure suggest the possibility of sensory involvement.