Io8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



6*5. Posterior levator of the middle trochanter (fig. 22 D). — Origin 

 posteriorly in coxa, insertion posteriorly on base of trochanter beyond 

 coxal articulation. 



86. Thoracic depressor of the middle trochanter (fig. 22 C, G). — 

 Origin dorsally on side of endosternum (C), insertion on end of 

 depressor apodeme of trochanter (G). 



8y. Anterior coxal depressor of the middle trochanter (fig. 22 D, 

 G). — Origin anteriorly in base of coxa (D), insertion on base of 

 depressor apodeme of trochanter (G). 



88. Posterior coxal depressor of the middle trochanter (fig. 22 D, 

 G). — Origin posteriorly in base of coxa (D), insertion on base of 

 depressor apodeme of trochanter (G). 



8q. Reductor of the middle femur (fig. 22 D, G). — Origin antero- 

 dorsally in trochanter, insertion posteroventrally on base of femur. 



go. Extensor of the middle tibia (fig. 22 L). — A long pinnate 

 muscle arising on dorsal wall of femur, inserted by axial tendon on 

 dorsal process of base of tibia. 



gi. Flexor of the middle tibia (fig. 22 J). — A muscle similar to but 

 larger than the extensor, arising on ventral wall of femur, inserted by 

 its tendon on ventral genuflexor plate {gf) at base of tibia. 



g2. Productor of the middle tarsus (fig. 22 E).— A slender pinnate 

 muscle arising anteriorly in tibia, inserted by tendon anteriorly on 

 base of tarsus. 



pj. Reductor of the middle tarsus (fig. 22 E). — Similar to the pro- 

 ductor, arising posteriorly in tibia, inserted posteriorly on base of 

 tarsus. 



P4. Depressor of the middle tarsus (fig. 22 F). — A broad pinnate 

 muscle arising on ventral wall of tibia, inserted ventrally on base of 

 tarsus. 



p^. Flexor of the pretarsal claws of the middle leg. — Same as in fore 

 leg and hind leg, one group of fibers arising in base of femur, another 

 in tibia, inserted by long tendon on unguitractor plate at base of 

 pretarsus. 



pd. Retractor of the mesothoracic postphragma (figs, 16 C, 27 C). — 

 A small fan-shaped muscle arising by narrow end on posterior median 

 process of propodeum, fibers spreading anteriorly and laterally to 

 attachments on side of postphragma of mesothorax. {Musculus re- 

 tractor mesophragnmti Morison, mesophragma retractor muscle 

 Betts.) The muscles of this pair probably are the longitudinal dorsal 

 muscles of the mctathorax with their propodeal attachments shifted 

 posteriorly. 



