264 



THE WINGS OF EMBIIDINA 



R2 and R3 coalescing to the margin of the wing ; the media is reduced to an 

 unbranched condition ; there is what appears to be a typical arculus at the 

 base of the wing; the cubitus is two-branched; the first anal vein is 



Ciii 



Fig. 261. — Wing of Embia sabulosa (After Enderlein, with some changes in the lettering 



of the veins). 



replaced by an anal furrow; the second anal vein is well-developed; and 

 there are comparatively few cross veins. 



Illustrations of the more important modifications of the type of wing- 

 venation possessed by Embia sabulosa are shown in the following figures. 



^3U ^' + ^ 

 Fig. 262. — Wings of Donaconethis abyssinica (After Enderlein). 



In several genera veins Ri and R2+3 coalesce at the tip; this condition 

 is shown in Figures 259 and 262. 



