FoLSOM. — Development Anurida. 



PLATE 6. 



Fig. 35. Transverse slightly oblique section of head at Stage 8. X 480. 



Fig. 36. Dorsal aspect of left mandible of adult. X luO. 



Fig. 37. Dorsal aspect of anterior extremity of adult right mandible. X 480. 



Fig. 38. Dorsal aspect of skeletal structure of internal mouth-parts in situ. X 150. 



Fig. 39. Dorsal aspect of head of left maxilla in adult. X 480. 



Fig. 40. Surface view of finished labrum. X 150. 



Fig. 41. Head of adult insect viewed from the left side. X 150. 



