NO. 2289. LEAFHOPPERS OF THE GENUS GYPON A— GIBSON. 89 



16. Female segment with sinuations shallow 23. grisea Spangberg. 



Female segment with sinuations very deep 7. dictitoria, new species. 



17. Ocelli nearer anterior than posterior margin of vertex 18. 



Ocelli equidistant from anterior and posterior margins of vertex or nearer 



posterior 19. 



18. Margin of vertex bluntly rounded, species large 29. marginifrons Fowler. 



Margin of vertex thin, foliaceous, species small 33. dracontea, new species. 



19. Elytra reticulate 20. 



Elytra not reticulate 24. 



20. Anterior margin of vertex black. Two prominent black dots on pronotum. 



5. ramosa Kirkaldy. 

 Anterior margin of vertex concolorous with rest of head. No black dots on 



pronotum 21. 



21. Female segment with a deep square notch at the middle of posterior margin. 



1. rugosa Spangberg. 

 Female segment without a square notch at middle of posterior margin 22. 



22. Female segment trisinuate, middle one small, lateral ones larger. 



3. pruinosa SpS,ngberg. 

 Female segment simple, posterior margin concave 23 . 



23. Female segment with a nearly truncate posterior margin, only slightly concave. 



Species small 4. geminata Osbom, 



Female segment with posterior margin noticeably concave. Species larger. 



2. octo-lineata Say. 



24. Vertex extremely long, nearly as long as pronotum 25. 



Vertex only a little over half the length of the pronotum 27. 



25. Species small, narrow, decidedly green. Vertex acutely pointed. 



6. tenella Sp&ngberg. 

 Species broader, brown or grayish. Vertex rounded, if pointed not acutely so. .26. 



26. Species small, short, less than 10 mm. long 32. cinerea Uhler. 



Species longer, larger, normally 10 mm. long 31. fraterna Spangberg. 



27. Species dark colored, head and pronotum black or partly so 28. 



Species greenish, yellowish, or brown, not black 29. 



28. Species stout, broad. Abdomen above solidly black 19. melanota Spangberg. 



Species more slender. Abdomen above transversely banded with black. 



18. verticalis Stal. 



29. Base of clavus unmarked with black or dark brown 30. 



Base of clavus black or dark brown 31. 



30. Female segment nearly truncate, small tooth at middle 11. unicolor Stal. 



Female segment deeply and evenly sinuate as in octo-lineata. 



8. angulata Spangberg. 



31. Pronotum with a small black dot on either side. Female segment truncate or 



nearly so, without deep sinuations 32. 



Pronotum unmarked. Female segment with deep sinuations. 



25. negotiosa, new species. 



32. Species comparatively broad, large 10. himaadata Spangberg. 



Species long and comparatively slender 9. nimbunda, new species. 



1. GYPONA RUGOSA Sp&ngberg. 



Gyponarugosa SpIngberg, K. Svenska Vet. Akad. Handl., vol. 5, No. 3, p. 6, 1878. 



This species has the general appearance of octo-lineata Say, but 

 from which it may easily be distinguished by the square deep notch 

 in the last female segment. The roughened or rugose surface of the 

 vertex, pronotum, and elytra is quite characteristic of this species. 



