HYMENOPTERA 



323 



••©1-9'' 





Fig. 278. — Apis. Sagittal section of anterior end of egg. (dr) Dorsal strip, (gh) Germ 

 band, (j/c) Yolk cell. 



Fig. 279.— Apis. Cross section. (Ip) Ectodermal lateral plate, (mp) Mesodermal 

 middle plate, (ser) Serosal cells. 



