NO. 7 



THE INSECT CRANIUM SNODGRASS 



17 



Fig. 4. — Dermaptera and Orthoptera. 



A, Anisolabis tnaritima (Gene), Dermaptera, head of adult. B, Forficnla 

 auricularia L., Dermaptera, head of adult. C, same, exuviae of head and 

 prothorax, frontal apotome turned downward. D, Tenodera sinensis Sauss., 

 Mantidae, head of adult. E, same, head of first nymphal instar, dorsal, showing 

 temporal sulci {ts) ending far from arms of cleavage line. F, same, head 

 exuviae of last nymphal instar, frontal apotome turned downward. G, same, 

 inner surface of facial wall of adult head, showing branch (d) of temporal 

 ridge (TR) extending into arm of cleavage line (CL). H, Periplaneta anueri- 

 cana (L.), Blattidae, head of adult emerging from nymphal cuticle. I, same, 

 cast-off exuviae of head, ventral view. J, Melanoplus diffcrcntialis (Thos.), 

 Acrididae, upper part of exuviae of head. 



