274 



EMBRYOLOGY OF INSECTS AND MYRIAPODS 



am.ser 

 A 



Fig. 205. — Oncopeltus. Cross sections at different levels, {am. cav) Amniotic cavity. 

 {am-, ser) Amnioserosa. {gb) Germ band. {M) Head lobe. {U) Inner layer, {ser) Serosa. 



C D 



Fig. 206. — Oncopeltus. Cross sections, {am) Amnion, {ect) Ectoderm, {hi) Head lobe, 

 {il) Inner layer, {ser) Serosa. 



