June iSSS.J 



PSYCHE. 



G7 



SYNOPSIS OF NORTH AMERICAN CICADIDAE. 



BY CHARLES WILLIAM WOODWORTH, CAMBRIDGE, MASS. 



The following synopsis will enable 

 one to easily distinguish our North 

 American species. 



GENERA. 



A. Second abdominal segment of the 

 male expanded and partly or wholly 

 concealing the tympanum. 



B. Side margins of the thorax ex- 

 panded horizontally. Za7nma>-a. 



BB. Side margins of the thorax not 

 horizontal, hardly expanded. 



C. First apical crossvein oblique. 



D. Basal cell of anterior wing 

 less than twice as long as 

 broad. Cicada. 



DD. Basal cell of anterior wing 

 twice as long as broad.- Tet- 

 tigia. 



CC. First apical crossvein form- 

 ing right angles with the princi- 

 pal veins. Proarna. 



AA. Second abdominal segment of 

 the male not expanded. Tympanum 

 free or wanting. 



E. Ulnar veins separate and 

 distinct at base. 



F. Tympannum present Ti- 

 bicen. 



FF. Tympanum wanting, 

 wings rather shorter and 



broader than usual, cells 

 wide. Platypedia. 

 EE. Ulnar veins united at 

 base. Melampsalta. 



SPECIES. 



Zainniara Am. & Serv. 

 smaragdina Walker. ^ 

 angulosa Walker. 

 San Diego, California ; also INIexico. 



Cicada Linn. 

 a. Opercles rounded behind in both 

 sexes. 



b. Wings unclouded except at the 

 crossveins. 



c. A median dorsal row of 

 white spots on the abdomen 

 above, dorsata. 



CC. No dorsal white spots on 

 the abdomen. 



d. Male genitals bt-oad, med- 

 ian dorsal spine generally 

 short, blunt, or wanting. 

 Anterior prothoracic spots 

 generally separated from the 

 others, jnargitiala. 



dd. Male genitals narrow, 

 median dorsal spine gener- 

 ally large and acute. An- 

 terior prothoracic spots al- 

 ways united with the others. 

 All generally forminga broad 

 V-shaped spot, tibicen. 



