146 Journal New York Entomological Society. [VoL xxvi. 



Tibicen linnei (Smith & Grossbeck)- PI. VII, fig. i. 



Ratlifif, summer, 1915, female (A. Mcintosh). There is consid- 

 erable uncertainty about this specimen, for the reason that locality 

 labels may have become mixed, but as the species occurs in Tennessee 

 there is no reason why it should not occur in Mississippi as well. 



The female of this species often closely resembles that of T. prui- 

 nosa, but in linnei the fore wings are abruptly bent near the middle, 

 whereas in pruinosa the curve is more regular. The song is very 

 different from that of pruinosa and is a continuous z-ing, but gener- 

 ally of short duration. 



Tibicen davisi (Smith & Grossbeck). PL VII, fig. 3. 



Longview, September, 1916, female (J. H. Oswalt) ; Vimville, 

 August 2, 1914, female (E. R. Raney) ; Columbia, July, female (B. 

 Morris) ; Hattiesburg, August, 1916, male (W. H. Cook) ; Caesar, 

 summer, 1916, male and female (R. H. Stewart) ; Anner, July, 1915, 

 male, and summer, 1916, male (H. P. Smith) ; Long Beach, July 10, 

 1916, male (W, J. Frederich). 



In addition to the above there is a female which represents a 

 variety of davisi. We also have two others from Arkansas. This 

 variety may be described as follows : 



Tibicen davisi var. harnedi new variety, PI. VII, fig. 4. 



Type male, Helena, Arkansas, June, 1916 (K. D. Jacob). Davis 

 collection. 



Allotype female, Rodney, Jefferson Co., Miss., August, 1917 (O. 

 A. Hammett). Collection, Miss. Agri. and Mechanical College. 



More robust than typical davisi, with broader wings, the first 

 seven marginal cells of the fore wings being clouded much as in 

 Tibicen superha Fitch. The dorsal markings are quite green in color, 

 the central, green, wedge-shaped mark on the pronotum is not sepa- 

 rated from the hind margin, but is confluent with it; the collar is 

 bright green. The dorsal surface is less rusty in appearance than in 

 typical davisi. Beneath the abdomen is greenish, without the " nar- 

 row black portion in the center," as in typical davisi. 



In addition to the type and allotype we have a female from Hot 

 Springs, Arkansas, September, 1917 (M. R. Harrington). 



We figure a typical T. davisi from North Carolina, and the type 

 of var. harnedi. 



