NO. 2 HONEY BEE — SNODGRASS IO7 



(fig. 17 C), inserted on ventral side of humeral complex of first wing 

 (fig. 19 C). 



75. Pleurotergal muscle of the mesothorax (fig. 17 E). — \ large, 

 fan-shaped muscle arising on episternum, the fibers convergent to 

 short tendon attached on lateral margin of posterolateral plate of 

 scutum (fig. 19 F). {Retractor scutelli mesothoracis Morison.) 



yd. Plenroaxillary muscles of the mesothorax; flexors of the fore 

 wing (figs. 17 E, 19 H). — Three small muscles arising on meso- 

 pleuron, inserted by separate tendons on third axillary of wing base. 



yy. Basalar muscle of the mesothorax (figs. 17 E, 19 G). — A broad 

 muscle with spreading fibers arising ventrally on anterior part of epi- 

 sternum, inserted dorsally by strong tendon on basalar sclerite. 



7<?. Muscle of the axillary lever of the mesothorax (fig. 20 A, B). — 

 Origin by broad base ventrally on mesothoracic arm of pterothoracic 

 endosternum, insertion dorsally on end of lever sclerite of fourth 

 axillary. (Musculus furco-lateralis mesothoracis Morison.) In non- 

 apoid Hymenoptera this muscle is a muscle of the postphragma (fig. 

 20 C to H). 



yp. Pleurosternal muscle of the mesothorax (fig. 17 G). — A mass 

 of short fibers arising on posterior epimeral area and on pleural 

 apophysis of mesothorax, attached on end of mesothoracic arm of 

 pterothoracic endosternum. 



80. Lateral promotor of the middle coxa (figs. 17 G, 22 C). — A 

 slender muscle arising on the small pleural apophysis of mesopleuron, 

 inserted laterally on coxal base anterior to pleural articulation. 



81. Mesal promotor of the middle coxa (fig. 22 C). — Smallest of 

 the mesocoxal muscles, arising on basal plate of endosternum, in- 

 serted mesally on anterior margin of coxa. 



82. Lateral remotor of the middle coxa; coxosubalar muscle of the 

 mesothorax (figs. 17 G, 22 C). — A long muscle attached ventrally on 

 base of coxa just posterior to pleural articulation, attached dorsally 

 by long tendon on subalar sclerite. Probably has little motor effect 

 on the coxa ; deflects the wing posteriorly by indirect tension on the 

 third axillary. (Flexor coxae mesothoracis Morison ; no correspond- 

 ing muscle given by Duncan in mesothorax of the wasp.) 



8^. Mesal remotor of the middle coxa (fig. 22 C). — Largest of the 

 coxal muscles, origin on basal plate of endosternum, insertion mesally 

 on posterior margin of base of coxa. 



84. Anterior levator of the middle trochanter (fig. 22 D). — Origin 

 in lower part of coxa, insertion anteriorly on base of trochanter beyond 

 coxal articulation. 



