350 Annals Entomological Society of America [Vol. VI, 



and radius has two branches except in Myndus (Fig. 56). 

 Medius is typically three branched except in CEcleus (Fig. 63), 

 where it is onl^ two branched. Cubitus is unbranched in 

 Myndus, and two branched in all of the other members of 

 this subfamily that I have examined. 



Sub-family Delphacida. 



In the fore wing, subcosta is typically two branched. Radius 

 is coalesced with subcosta for about half of its length, when it 

 diverges suddenly, then coalesces near the middle of its course 

 with medius one plus two. It then diverges toward the costal 

 border of the wing. Medius is typically three branched, 

 the branches represented being medius one, medius two and 

 medius three plus four. Medius three plus four frequently 

 coalesces for a short distance with cubitus one, as in Liburnia 

 (Fig. 53) and Stenocranus (Fig. 49). In Stobara (Fig. 51), 

 these two veins are connected by a short cross vein. Cubitus 

 is three branched an accessory vein being developed along 

 the anal side of cubitus one. In the hind wing, subcosta and 

 radius are coalesced for more than half of their length and 

 medius is unbranched. Cubitus is typically two branched, 

 cubitus one coalescing for almost its entire length with medius, 

 being separated only at its tip. The anal area of the hind wing 

 is considerably enlarged and the third anal is frequently three 

 branched. 



ACKNOWLEDGEMENTS. 



The writer wishes to express his appreciation for the kindly 

 advice of Professor Herbert Osborn, and for the helpful criti- 

 cisms of C. L. Metcalf, who furnished, also, the specimens of 

 Myndus radicis, Osb., the only species of the subfamily Cixiida 

 available for study. C. S. Brimley and Rev. A. H. Manee 

 have furnished some material, but Luella Correll Metcalf 

 has collected most of the material which was used as a basis 

 for this paper. 



