PLATE 2 



EXPLANATION OF FIGURES 



23 and 24, 27 to 32, 35 Ventral aspect of the head, appendages removed. 

 36 to 41 Endosekleton of the head, dorsal wall of the head capsule, append- 

 ages, and internal organs removed. 



23 Blatta orientalis. 



24 Mantis religiosa. 



25 Diapheromera femorata, caudal aspect of the head, appendages removed. 



26 Mantis religiosa, postcoila enlarged. 



27 Orchelimum vulgare. 



28 Gryllus pennsylvanicus. 



29 Diapheromera femorata. 



30 Melanoplus differentialis. 



31 Stenopelmatus sp. 



32 Anisolabis maritima. 



33 Diapheromera femorata, cephalic aspect of the head, appendages in situ. 



34 Melanoplus differentialis, postcoila enlarged. 



35 Tettix arenosus. 



36 Blatta orientalis. 



37 Gryllus pennsylvanicus. 



38 Diapheromera femorata. 



39 Melanoplus differentialis. 



40 Tettix arenosus. 



41 Mantis religiosa. 



292 



