THE CANADIAN ENTOMOLOGIST Hn 



in some respects. The Orthopteroid superorder is somewhat intermediate be- 

 tween the Isopteroid superorder and the Plecopteroid superorder with its closest 

 affinities very slightly nearer the former, though the balance between the Isop- 

 teroid and Plecopteroid characters in the Orthopteroid group is fairly evenly 

 divided. The Isopteroid and Plecopteroid superorders are both very close to the 

 Palaeodictyopteroid group, which may represent the common ancestors of both. 



Bibliography. 



1920 Caudell : — Zoraptera not an Apterous Order. Proc. Ent. Soc Washington, 

 Vol. 22. 



1920 Crampton : — Some Anatomical Details of the Remarkable Winged Zorap- 



teron Zorotypus, etc. Proc. Ent. Soc. Washington, \'ol. 22. 



1921 Crampton : — A Phylogenetic Study of the Fore Wings of Zoraptera. Psoc- 



ida, etc. Ent. News, Vol. 32. 



1901 Enderlein: — Morphologic, etc. der Atropiden und Trociden. Results Swed- 

 ish Exped. to Egypt, etc. Xo. 18. 



1903 Enderlein : — Copeognathen des Indo-Australischen Faunengebietes. Ann. 

 Hist. Nat. Mus. Nation. Hungarici, Bd. 1. 



1906 Enderlein :- — Aussereuropaeische Copeognathen, etc. Zool. Jahrb. Abt. Sys- 

 tematik, etc., Bd. 24. 



1913 Silvestri • — Descrizione di un Xuovo Ordine di Insetti. . Portici. 



1909 Patch : — Homologies of \\ ing Veins of the Aphididae, etc. Ann. Ent. 

 Soc. America, Vol. 2. 



Abbreviations. 



The numerals written to the right and below the letters indicate branches 

 of the veins referred to. A plus sign between letters indicate;; a coalescence of 

 the veins in question. 



al. . . . Anolobus or anal lobe (vestigial anoflabellum, or anal fan of lower in- 

 sects). 



A. . . . First anal vein. 



ap. . .Anoplica, or anal fold. 



as. . . Anosinus, or anal sinus. 



ax. . .Axillary vein ( seconrl anal). 



ch. . .Costahamus, or costal hook. 



Cu . .Cubitus. 



M... Media. 



ps. . . Pterostigma. 



R . . . Radius. 



Rg . .Radial sector. 



Sc. . . Subcosta. 



