Sept.-Dec, I9i8.] DaVIS : MISSISSIPPI CiCADAS. 147 



Measurements in Millimeters. 



Male Type. Female Allotype. 



Length of body 33 30 



Width of head across eyes 13. 5 14 



Expanse of fore wings 81 87 



Greatest width of fore wing 13 13 



Greatest width of operculum 6 



Tibicen davisi occurs throughout the southeastern states as far 

 north as New Jersey. Its song- is a continuous z-ing of short dura- 

 tion, and is more sharp in tone, though not as loud as that produced 

 by the larger, related black species. 



Tibicen similaris (Smith & Grossbeck). PI. VIII, fig. 2. 



Agricultural College, October ii, 1914, male, October 14, 1914, 

 female, and "summer," male. Anner, summer, 1916, male (H. P. 

 Smith) ; Kiln, summer, 1916, male (H. W. Lee). 



This species occurs from Mississippi to Virginia, and is very 

 common in parts of Florida, where it may be heard singing in the 

 small turkey oaks and elsewhere. In fresh specimens there is a 

 pruinose lateral mark along the base of the abdomen often observable 

 when the insect is in flight. 



Tibicen lyricen (De Geer). PI. VIII, fig. i. 



Red Bank, August, 1917, male (J. G. Kizer) ; Logtown, summer, 

 1917, female (A. Lutken) ; Rienzi, August 23, 191 5, male (H. Y. 

 Jumper). 



This is a widely distributed insect in the eastern half of the 

 United States, being found from Texas to Florida, and Kansas to 

 Massachusetts. In the higher parts of Virginia, North Carolina, 

 Tennessee and Georgia, the variety engelhardti (Davis) is the pre- 

 vailing form of the species. This is characterized by having the pro- 

 notum and mesonotum nearly all black, except for the somewhat 

 anchor-shaped, tawny spot on the former. It will perhaps be found 

 in the uplands of Mississippi. 



The song of lyricen is a rather monotonous sing. 



Tibicen sayi (Smith & Grossbeck). 



Figured in Howard's Insect Book under the name of tibicen, PI. 

 27, fig. 20. 



