Prothorax

The setae on the postpronotum, which belongs to the pronotum, and the setae on the proepimeron, which belongs to the propleuron, are phylogenetically important for the Milichiidae. The prosternum includes pre- and basisternum. I use the terms pre- and basisternum in the sense of Speight (1969), in contrast to J. F. McAlpine (1981), who uses the term "prosternum" for the basisternum. The basisternum lies between the insertion of the fore coxae. The presternum is located in the cervical membrane, anterior to the basisternum. It is in contact anteriorly with the cervical organ, which probably has a sensory function. Laterally of the cervical organ lies the lateral cervical sclerite and posterior to it the narrow posterior cervical sclerite, which articulates laterally with the propleuron (ex Brake 2000).