86 Annals Entomological Society of America [Vol. XIII, 



and extending on to the reticulations, while he made the form 

 with yellow stripes a variety. 



This variety probably occurs throughout the range of the 

 species but is most abundant in the Atlantic coast region. 



Var. striata Burm. 



Gypona caiia Burm.; Gypona flavilineata Fh.; Gypona quebecensis Prov.; Gypona 

 scrupidosa Spgb.; Gypona olivacea Spgb.; Gypona geminata Osb. 



Green with six more or less definite yellow stripes on vertex 

 and pronotum. Reticulations very variable. 



This form is the most common one throughout the wide 

 range of the species. It was described from Pennsylvania. 

 Burmeister was evidently not aware of Say's descriptions of 

 octolineata at the time. Gypona cana Burmesiter described for 

 Carolina probably represents the heavily reticulate type. The 

 peculiar genital structure described by Burmesiter in connection 

 with cana has not been found in any member of the genus and 

 was probably based upon a mutilated specimen. 



Var. pruinosa Spangb. 



Examples of a pale, slightly reticulated and usually markedly 

 pruinose variety occurring from Georgia to Texas are placed 

 here. 



3. Gypona (Gyponana) rugosa Spangb. 



Gypona raniosa Kirk; Gypona dclkala Fowl. 



Yellowish green, elytra heavily reticulate, whole surface 

 coarsely rugose shining. Female segment deeply rectangularly 

 notched. Some examples show definite black spots on pro- 

 notum behind the eyes and definite pale lines. Others vary all 

 the way from this to entirely wanting. 



This very active species is found both as larvae and adult on 

 the burr and white oak from New York, Wisconsin and southern 

 Colorado, south to Florida and Mexico, and west to Arizona. 

 Gibson separates ramosa Kirk, on the black spots, but all 

 gradations in this character are common; delicata of Fowler, is 

 evidently an immature example of this species. 



Subgenus Gypona Burm. 



Very large broad leaf hoppers with long, fiat vertices sharpl}'' 

 angled with the front, the margin thin, and foliaceous. Venation 

 constant, five apical and three anteapical cells. Burmeister 



