479 



Plate LIX 



Fig. 9. Longitudinal section through egg of Camponotus 2 days old. X 52. 

 Fig. 10. Transverse section through blastoderm near posterior end of germ band. 



Same age as the one represented by Fig. 9. X 'J'S. 

 Fig. 11. Transverse section through same stage as that represented by Figs. 9 and 



10. Taken near anterior end of germ band. X 78. 

 Fig. 12. Longitudinal section through blastoderm of Camponotus at a somewhat 



later stage than that represented by Fig. 9. X 52. 



Plate LX 



Fig. 13. Transverse section through anterior end of blastoderm of Camponotus. 



Same age as that represented by Fig. 12. X 78. 

 Fig. 14. Transverse section through middle of blastoderm. Same age as that 



represented by Fig. 12. X 78. 

 Fig. 15. Longitudinal section through blastoderm of Camponotus 5 days old. 



X 52. 

 Fig. 16. Longitudinal section through blastoderm of Camponotus 6 days old. 



X.7S._ 

 Fig. 17. Longitudinal section through blastoderm of Camponotus 8 days old. 



X 52. 



Plate LXI 



Fig. 18. Transverse section through blastoderm of Camponotus 8 days old. 



X 105. 

 Fig. 19. Transverse section through embryo of Camponotus 14 days old. X 105. 

 Fig. 20. Transverse section through enibrvo of Camponotus 15-20 days old. 



X 105. 

 Fig. 21. Embryo of Camponotus S-12 days old. X 52. 

 Fig. 22. Embryo of Camponotus showing development of appendages. X 52. 



Plate LXII 



Fig. 23. Ventral view of germ band of the same age as that represented by Fig. 

 22. The yolk mass has been removed and the embryo, which is nor- 

 mally curved over the yolk, has been straightened out. X 52. 



Fig. 24. Embryo of Camponotus. A later stage than that represented by Fig. 23. 

 X 52. 



Fig. 25. Embryo of Camponotus at a stage just before hatching. X 31. 



Fig. 26. Embryo of Myrmica. Early stage. X 91. 



Plate LXIII 



Fig. 27. Embrvo of Myrmica, at a stage somewhat later than that represented by 

 Fig. 26. X 114. 



Fig. 28. Ventral view of anterior end of germ band of same age as that repre- 

 sented by Fig. 27. X 91. 



Fig. 29. Side view of later stage of embrvo of Mvrniica than that shown in Fig. 

 27. X 91. 



Fig. 30. Ventral view of same stage as the embryo shown in Fig. 29. X 91- 



Fig. 31. A slightly different view of the same embryo. X 91. 



Plate LXIV 



Fig. 32. A later stage of the embryo of Myrmica. X 91. 



Fig. 33. A still later stage of the embryo of Myrmica. X 91. 



Fig. 34. Ventro-frontal view of same embryo as in Fi"^. 33. X 91. 



Fig. 35. Embryo of Myrmica at a stage when it is straicrhtening. X 80. 



Fig. 36. Embryo of Myrmica just before hatching. X 91- 



