I 



THE WINGS OF ALEURODIDJE 



289 



Comstock-Needham 



COMPARISON OF TERMINOLOGIES OF THE WING-VEmS OF THE APHIDID.^ 



The following table is given by Miss Patch: — 

 After Buckton Current terminology 



FORE WING 



Costal Nenoire Costal 



Cubitus or post-costal Subcostal vein 

 nervnire 



Stigmatic 

 First furcal 

 Second furcal 

 Cubital nervnire 



Second oblique 

 First oblique 



Stigmal vein 

 First branch 

 Second branch 

 Third discoidal or 

 cubital 



Second discoidal 

 First discoidal 



HIND WING 



Cubitus or post costal Subcostal vein 



nervure 

 Second oblique 



Second discoidal 



First oblique 



First discoidal 



(g) THE WINGS OF THE 

 ALEURODID^ 



In the fore wings of freshly 

 emerged Aleurodes, Miss Patch 

 found four fine but distinct tra- 

 chese, the costal, subcostal, radial, 

 and cubital (Fig. 296, a). All of 

 these extend separate to the base 

 of the wing. The medial trachea 

 is suggested merely by a very 

 faint and delicate but constantly 

 appearing tracing in the wing. 



In the definitive venation of 

 the fore wing (Fig. 296, 6), costa, 

 subcosta, vein Rj, and media are 

 lacking, only the main stem of 

 radius, the radial sector, and 

 cubitus being developed. 



Costa (C.) 



Subcosta (Sc) 



Radiusi (Ri) (together 

 with basal portions ofthe 

 remaining wing veins). 



Radial sector (Rs) 



Media (Ml) 



Media (M2) 



Media (M) 



Media 3+4 (M3 +4) 

 Cubitus (Cu) 

 First Anal (ist A.) 



Radial sector (Rs). 



Media (M.) 

 Cubitus (Cu.) 



Fig. 296. — Wings of Aleurodes (After Patch). 



