NO. 2 



HONEY BEE — SNODGRASS 



83 



anterior margin of the sternal plate of the petiole (E, G). The lateral 

 muscles of the petiole include a pair of two-branched dorsal muscles 

 arising anteriorly on the sides of the propodeum (figs. 27 B, 28 A, 

 121) and inserted on the lateral angles of the tergum of the petiole 



Fig. 27. — The propodeum and petiole. (Figures, except E, from Snodgrass, 

 1933- ) 



A, abdomen of worker, including propodeum. B, muscles in right side of 

 propodeum, mesal view. C, propodeum and petiole, dorsal wall of propodeum 

 removed, exposing muscles. D, levator mechanism of abdomen exposed by 

 removal of left wall of propodeum and petiole. E, ventral muscles of petiole, 

 dorsal view. F, petiole and end of propodeum, dorsal view, upper wall of 

 petiolar pocket {e) removed to show insertion of levator muscles {120). 

 G, anterior end of petiole, showing muscle attachments on tergal and sternal 

 plates. 



e, membranous roof of dorsal pocket of petiole; /, /, fulcra of movement of 

 abdomen on propodeum ; r, median ridge on floor of petiolar pocket ; t, posterior 

 area of propodeum adjoining petiole. 



(fig. 27 G), and a pair of ventral muscles arising on the metathoracic 

 sternum (E, 119), which are inserted laterally on the end of the 

 petiole sternum (E, G), The cavity of the neck of the petiole is 

 divided transversely by the ventral diaphragm (G, VDph), which 



