1916] 



Breeding Habits of the Orthopte 



133 



divisions, one including the Phasmids and the Acridid^ with 

 some others that are not being considered here for want of 

 information concerning their habits, and the other the Locustidae 

 and the crickets. The Gryllotalpin^ have arisen in compara- 

 tively recent times from the typical stock of the Gryllidse 



< < Q >- '^^ < UJ 



a: ec o orox ^ < 



(9 19 -J h- <o- m z 



Fig. 6. Scheme indicating the phylogeny of the Orthoptera. 



A comparative study of Figures 5 and 6 suggests that the 

 agreement between the diagrams is not a mere coincidence 

 l^rom a common ancestral stock specialized types have arisen 

 some persisting and others perishing. We may assume that 



