Sept.-Dec, I9i8.] DaVIS : MlSSISSirPI CiCADAS. 153 



reported by Mr. George H. Kent, Suffolk, Franklin county, who re- 

 ports their appearance throughout the southwestern portion of the 

 county in the month of May." 



Brood XXVII (1915-1928) ; '"a small brood was reported for 

 Franklin County, Miss., as appearing about May 20, 1902, by Mr. 

 George H. Kent, of Suffolk." 



Variety cassinii (Fisher) is smaller than the typical form, with 

 the ventral surface of the abdomen generally much darker in color. 



Okanagana viridis new species. PI. VIII, figs. 4 and 5. 



Type male, O'Reilly, Mississippi, July 10, 1917 (Ernest Wal- 

 dauer)). Davis collection. 



Ofcanagatia uiridis 



A green insect, almost unicolorous, with the membranes or flaps at the 

 base of the wings yellowish. The venation of the wings is green, except the 

 costal margin, which is yellowish to the end of the radial cell. The basal cell 

 is nearly clear. There is also a slight indication of yellow about the head, the 

 tympana and the uncus. The front of the head is rounded and not prominent, 

 the eyes are not prominent, and the uncus is straight, as shown in the figure. 

 Beneath the insect is green about the head and fore legs, and yellowish green 

 centrally to the end of the valve. The sides are green. The colors are the 

 same in both the type and allotype. The notch in the last ventral segment of 

 the abdomen of the female is simple, that is not doubly notched as in some 

 species of Okanagana. 



Measurements in Millimeters. 



Male Type. Female -Allotype. 



Length of body 25 22 



Width of head across eyes 7.5 7.6 



Expanse of fore wings 64 64 



Greatest width of fore wing 10 10 



Greatest width of operculum 2 



Length of valve 4.5 



