yO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 82 



/JO. Adductor of the coxa (fig. 38 C, D, E, F). — Origin on pos- 

 terior surface of lateral arm of sternal apophysis (E) beneath base 

 of first posterior rotator {122) ; goes posteriorly and downward be- 

 low 12^ and 124 to posterior part of inner margin of coxa (C, D, 

 E, 130). 



The following muscles belong to the telopodite of the hind leg. The 

 total number is the same as in the fore and middle leg, but there are 

 two distinct levators of the trochanter, and a reductor of the femur 

 is lacking. 



131. Anterior levator of the trochanter (figs. 36 D, 39). — Origin 

 on dorsal part of anterior wall of coxa ; insertion on anterior lobe of 

 dorsal rim of trochanter (fig. 36 D). 



132. Posterior levator of the trochanter (figs. 36 D, 39). — A two- 

 branched muscle arising dorsally in base of coxa ; both branches (132a, 

 132b) inserted on levator apodeme and supporting plate in dorsal 

 articular membrane close to rim of trochanter (fig. 36 D). 



133. Depressor of the trochanter (figs. 38 A, E, 39). — This muscle, 

 as in the other legs, consists of five branches, two of which arise in 

 the coxa, and three in the metathorax ; all are inserted on ventral rim 

 of trochanter and together constitute a strong depressor of the telopo- 

 dite. The coxal branches arise one anteriorly (fig. 39, 133a), the other 

 posteriorly in ventral part of coxa. Two of the body branches arise 

 on scutum of metatergum, one from lateral margm, the other (fig. 

 38 A, 133c) from center of lateral field. These two branches converge 

 downward and unite before the pleural arm in a broad, tough band of 

 fibers that curves posteriorly beneath the pleural arm {PI A) to enter 

 the coxa. The third body branch arises from under surface of lateral 

 arm of sternal apophysis (fig. 38 A, E, 133d). 



134. Anterior levator of the tibia (figs. 36 F, 39). — This muscle 

 appears to be represented in the hind leg of Dissosteira by only a very 

 delicate tendinous strand arising from the anterior angle of the tibial 

 base (134AP), and extending proximally for a short distance against 

 the anterior wall of the distal part of the femur. The writer was un- 

 able to discover muscle fibers attached to this tendon. 



/J5. Posterior levator of the tibia (figs. 36 F, 39). — This great 

 muscle occupies most of the cavity of the femur (fig. 39 A, B). The 

 fibers arise in short, overlapping bundles from anterior and posterior 

 walls of femur where they are attached on the spaces between the 

 " fish-bone " ridges, with dorsal fibers of posterior set {133b) arising 

 in dorsal crest of femur. Anterior and posterior fibers converge to 

 sides of a large, thin, flat apodeme that tapers distally to a thick stalk 



