Coxa

All coxae articulate dorsally with a coxifer or pleural process at the ventral end of the pleural suture of each thoracic segment. Ventrally the fore coxa articulates with the side of the exposed prosternum. The mid and hind coxae adjoin their corresponding invaginated furcasterna. Usually all coxae are short and stout, but in some forms with raptoral legs, e.g. certain Empididae, the fore coxa is as long as or longer than the femur and relatively slender. In the Mycetophilidae all coxae are rather long (ex McAlpine 1981).