748 



STUDIES IK AUSTRALIAN NEUROPTERA^ L, 



of these branches, or between two of them, may be of some value 

 ill specific diagnosis. 



(c) The Cubital Fork. 

 The term "fork" is usually applied, in venation, to the point 

 of bifurcation of a vein, and not to one of the resulting branches. 

 It is unfortunate, therefore, that Cuo has been termed the "cubital 

 fork" ill Myrmeleonidie, e>specially as the term "lower branch of 

 cubitus" takes priority, and is free from objection. I propose to 

 restrict the term "fork" to its more legitimate meaning; so that, 

 in future, by "cubital fork" the point of bifurcation of Cu will 

 be indicated, while by "median fork" (in the forewing only), we 

 shall understand the point at which the oblique vein O leaves 

 Mp The abbreviations cuf and mf may be employed for these 

 two points i-espectively. 



(d) The Basal Spaces. (Text-fig. 10). 



CLLX ax 



lA Cu. 



Text fi,'. 10. — Ba-al spaces and crossveins in forewing of a Myi nieleonid. 

 For nomenclature, see text. (Original). 

 The spaces into which the main veins divide the wing at the 

 base, are named from the vein bounding them anteriorly, as 

 follows. 



{}.) Costal space (c) between C and Sc, from base to pterostigma. 

 This has been called the "subcostal space" by some authors. The 

 crossveins in it should be called "costal crossveins" (ex), not sub- 

 costals. 



