302 



IVings. 



The relations of the wing-veins and cells are very obscure 

 and they have been little used in classification, except as regards 

 the presence of the submarginal vein and the supernumerary 

 cell. 



Four types are figured somewhat diagrammatically. viz., 

 Tetigoniine, 'Eupterygine, Agalliine and Asiracid. 



(i) Costal, absent or merged. 



(2) Subcostal. 



(3) Radial=^firsi sector P'icbcr=^cost<i\ Sigiiorcl. 



(4) il/r(//a;/=:second sector Ficbcr =rupper radial Sli^iiorci.. 



(5) C";//)/Ya/^third sector Ficbcr^lower radial Sigiiorct.. 



(6) f'irst a;/a/:= Radiating nerves Ficbcr. 



( 7) Scco)i(i anal. ' ' 



[The Claval suture (pliant suture Ficbcr) usually c<_)nies here.| 



(8) Axillary, or third anal^Claval. 



((.;) 5"//?7;//(7;x//;c7/=:peripheric nervure Ficbcr. 

 The only cell necessary to specify is 



(a) Supernumerary cell, often absent; it is formed by the fork- 

 ing of the radial. 



It is unnecessary to dilate on the legs. As the i)opular name 

 implies, they are saltatorial in construction, and so great is the 

 velocity of the leap in some forms {Oncoiuctopia and other 

 Tetigoniinae) that they have gained the name of "Sharpshoot- 

 ers." 



dn the Asiracidae, one of the spines which fringe the apex of 

 the tibiae, has in each posterior pair, beccmie greatlv enlarged, 

 often enormously so, and mobile, being set with "teeth" on its 

 outer edge; this is very characteristic of all instars. Curiously 

 enougdi, the Asiracidae are by no means the champion jumpers, 

 being surpassed both in length of leap and in velocity, bv Teti- 

 gonioids and Fulgoroids of less leg development and destitute 

 of a mobile spur. 



It seems necessary to state that the "apex" or "apical mar- 

 gin" of any section, is that part of it farthest from the junction of 

 thorax and abdomeji ; contrariwise, the "base" or "basalmargin" 

 is the part nearest. Most authors erroneously speak of the 

 basal angle of the scutellum as its apex; to avoid confusion, it 

 is better to refer to it as the "posterior angle." Further, the 

 part of the frons adjoining the clpeus is its apical margin and 

 the top of the head is (typically) the base of the frons and apical 

 margin of the vertex. 



