198 THE EMBRYOLOGY OF THE HONEY BEE 



Hyp 



MC 



FIG. 77. Transverse section through the future 'basal region of the 

 abdomen of an embryo, Stage VIII-IX; showing the structure of the 

 mesoderm (Meso}, x 387. 



...Mint 



Trlnv'' 



Hyp' 



FIG. 78. Transverse section through the fourth trunk segment of an 

 embryo, Stage IX, intersecting one of the tracheal vaginations (Trlnv}, 

 showing the formation of blood cells (BIC), x 387. 



