NO. 2 HONEY BEE SNODGRASS I05 



5/. Adductor of the propleuron (fig. 12 B). — A large muscle aris- 

 ing mesally on straplike apodeme of prothoracic endosternum (fig. 

 II E, n), inserted anteriorly on cervical apodeme of pleuron. {Re- 

 tractor episterni prothoracis Morison ; prothoracic furco-pleural 

 muscle Duncan.) The muscles of this pair cannot be retractors of 

 the episterna because of the endosternal attachments of the pleura. 



^2. Intersegmental ventral muscle of the prothorax ; endosternal 

 retractor of the propectus (fig. 12 C). — A slender muscle attached 

 anteriorly on base of proendosternum, posteriorly on supraneural 

 bridge of mesoendosternum (fig. 22 C). (Retractor prothoracis 

 Morison; first f ureal retractor of the propectus Duncan, the second 

 retractor of Vespula absent in Apis.) 



5J. Lateral promotor of the fore coxa (fig. 13 C, D, G). — A broad 

 muscle arising on episternum, inserted laterally on coxa anterior to 

 pleural articulation. 



54. Mesal promotor of the fore coxa (fig. 13 C, D).— A small 

 muscle arising on side of endosternum, inserted on anterior mesal 

 angle of coxal base. 



5^. First lateral remotor of the fore coxa (figs. 12 C, 13 C, D, G). — 

 Longest of the coxal muscles, arises laterally on pronotum at base 

 of spiracular lobe (fig. 17 C), inserted on outer rim of coxa behind 

 pleural articulation. 



5(5. Second lateral remotor of the fore coxa (figs. 11 C, 12 C, 

 13 C, D, G). — A large muscle arising on under surface of supra- 

 neural bridge of endosternum (figs. 11 C, 12 C), inserted on margin 

 of coxal base close behind 55 (fig. 13 D, G). 



57. Mesal remotor of the fore coxa (figs. 11 C, 13 C, D). — Smallest 

 of the coxal muscles, arising on upper end of pleural apophysis (fig. 

 II C), inserted mesally on posterior edge of coxal base (fig. 13 C, D). 



58. Coxal retractor of the propectus (figs. 11 C, 12 C, 13 C, D, G). 

 — A large muscle arising posteriorly on anterior part of median 

 ridge of pterothoracic endosternum (fig. 22 C), the pair diverging 

 forward to insertions on fore coxae mesad of pleural articulations 

 (fig. 13 C, D). {Extensor coxae prothoracis Morison; mesosternal 

 retractor of the propectus Duncan.) 



^g. Anterior levator of the fore trochanter (fig. 13 E, H). — Origin 

 in coxa, inserted anteriorly on base of trochanter beyond coxal 

 articulation. 



60. Posterior levator of the fore trochanter (fig. 13 E, H). — Origin 

 in coxa, inserted posteriorly on base of trochanter beyond coxal ar- 

 ticulation. Morison mentions only one trochanteral levator, but two 

 are present in both the drone and the worker. 



