DIFFERENCES FROM TYPICAL _T. pallidicinctus_.--There is no connection at all between pars caudifemoralis and the raphe between Mm. flexor cruris lateralis and femorocruralis. The posteroventral corner of pars iliofemoralis is some distance dorsal to the ventral edge of the ischium and, therefore, does not attach to the ischiopubic membrane. INDIVIDUAL VARIATION.--The insertion (narrow) is entirely tendinous in one leg. =_M. Flexor Ischiofemoralis_= (M. ischiofemoralis), Figs. 16, 17 _T. pallidicinctus_ GENERAL DESCRIPTION AND RELATIONS.--Thick; on lateral surface of anterior part of ischium; posterior end in lateral iliac fossa; deep to Mm. extensor iliofibularis and caudofemoralis pars iliofemoralis; overlapping ventral extrapelvic part of M. obturator and anteroproximal part of M. adductor superficialis (slightly fused to proximal edge of latter); posteroventral corner contacting anteroproximal corner of M. flexor cruris medialis; extreme anterodorsal corner usually overlapped by tendon of M. piriformis. ORIGIN.--The muscle arises fleshily from a large area on the lateral surface of the ischium extending ventrally to the origin of M. adductor superficialis, anteriorly to the level of the posterior end of the obturator foramen, dorsally to the ventral border of the ilio-ischiatic fenestra and to the depth of the lateral iliac fossa, and posteriorly approximately to the level of the ventral ischiatic tubercle. INSERTION.--The short flat tendon attaches to the lateral surface of the femur immediately posterior to the insertion of M. piriformis. INNERVATION.--The posterior tibial division of the sciatic nerve penetrates the dorsal surface. INDIVIDUAL VARIATION.--The ventral part of the insertion may be fleshy. _T. cupido_ INDIVIDUAL VARIATION.--None of significance. _P. p. jamesi_ INDIVIDUAL VARIATION.--In all the legs except one, an additional twig arises from the branch to M. flexor cruris medialis and penetrates the lateral surface of M. flexor ischiofemoralis. The ventral part of the insertion is fleshy in one leg. =_M. Adductor Superficialis_= (M. adductor longus et brevis, pars externa), Figs. 14, 16, 17 _T. pallidicinctus_ GENERAL DESCRIPTION AND RELATIONS.--Posterior to femur, lateral to M. adductor profundus, and medial to Mm. flexor ischiofemoralis, caudofemoralis, and femorocruralis; proximal end (fleshy) fused to proximal tendinous end of M. adductor profundus. ORIGIN.--The origin is fleshy and tendinous from the proximal end of the lateral surface of M. adductor profundus and from a narrow line on the ischium adjacent (dorsal) to the origin of the latter; the posterior part of the origin sometimes extends farther dorsally on the lateral surface of the ischium; the origin does not extend so far anteriorly nor so far posteriorly as the origin of M. adductor profundus; the anterior edge is at the posterior border of the obturator foramen.