ii6 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



Fig. 38. — Structure of the abdominal petiole of Apis mcllifica, worker 

 (Apidae). 



A, proppdeum and petiole, dorsal view, with upper wall of propodeum removed 

 to show muscles. 



B, anterior end of petiole, showing muscle attachments on second segment. 



C, dorsal view of petiole and end of propodeum, with dorsal wall of mem- 

 branous pouch (e) removed to show insertion of levator muscles (dim). 



D, abdomen, including propodeum. 



E, dorsal muscles in right side of propodeum, mesal view. 



F, levator mechanism of the petiole. 



di, dorsal muscles of mesothorax ; ds, dorsal muscles of metathorax ; dil, 

 lateral dorsal muscle of propodeum ; dim, median dorsal muscle of propodeurri ; 

 dis, dilator muscle of spiracle ; e, membranous dorsal wall of dorsal pouch of 

 petiole; /, /, fulcra of postabdomen on propodeum; os, occlusor muscle of spir- 

 acle ; r, median ridge on floor of pouch of petiole ; t, posterior triangular area 

 of tergum of propodeum ; vil, lateral ventral muscle of propodeum ; vi)ii, median 

 ventral muscle of propodeum. 



