Vol. Xxiii] ENTOMOLOGICAL NEWS. 26l 



A new Variety of Rihana (Cicada) sayi Grossbeck 



(Hemip.). 



By WM. T. DAVIS, Staten Island, New York. 



Through the courtesy of Mr. J. Chester Bradley, of Cornell 

 University, I have examined a number of. Cicadas from 

 Georgia, collected principally by him. Among them are 18 

 examples of Rihana sayi Grossbeck, described in ENTOMO- 

 LOGICAL NEWS for April, 1907. Ten of these are of the type 

 usually found in the Middle States, namely with the lateral 

 and posterior margins of the pronotum nearly all black with a 

 green spot on each side of the center of the latter. In the au- 

 thor's collection there are 86 examples from New York, New 

 Jersey, Ohio, North Carolina and Rabun Co., Ga., that follow 

 this pattern quite closely ; in several, however, the posterior 

 margin of the pronotum, or collar, is wholly black. 



There is a southern race more green in color than typical 

 Rihana sayi which may be called 



australis n. var. 



In this the pronotum is nearly all green, the two black triangular 

 spots near the anterior margin are reduced, the collar is green, touched 

 withjjlack at the lateral angles, and is narrowly margined in front 

 with the same color. There is also a black line in the center about I 

 mm. broad. The mesonotum is green, fulvous and black. 



Typical examples are from Albany, September, 1910; Bain- 

 bridge, July 1909, September, 1910 and Spring Creek, Deca- 

 tur Co., June, 1911; all collected by Mir. Bradley in Southern 

 Georgia. 



Fresh specimens of this variety are quite beautiful in color. 

 Two examples from Atlanta and one from Austell, Ga., ap- 

 proach the variety, but lack the green on the thorax. One of 

 the 86 specimens mentioned above, and collected on Staten 

 Island, N. Y., has the collar nearly all green, but lacks the 

 green on the thorax. 



By way of recording distribution it may be well to state that 

 Mr. Bradley's collection contains two Rihana davisi Grossbeck, 

 from Atlanta, Ga., September, 1909, and August, 1910, and 

 two Rihana engelhardti Davis, from Atlanta, Ga., July, 1910. 



