Dec, I9I5-] Davis: New Cicada from Arizona. 239 



A NEW CICADA FROM ARIZONA. 



By Wm. T. Davis, 



New Brighton, Staten Island, N. Y. 



Through the kindness of officials connected with the Biological Sur- 

 vey, U. S. Department of Agriculture, I recently had the opportunity 

 of examining a small collection of Cicadas from various parts of the 

 United States, and among them was the new species here described. 



Cicada cultriformis new species. 



Type male, Blue River, a branch of the Gila River in Greenlee 

 Co., Arizona, August 25, 1914. E. G. Holt, collector. (Collection 

 U. S. Biological Survey.) 



Resembles Cicada niarginata Say in size, color and markings. Head black 

 with an oblong greenish yellow spot each side between the eyes and a small 

 spot of the same color on the front just above the transverse rugae. Pronotum 

 greenish yellow with a large, conspicuous black spot occupying the fore part 

 of its central area (see Fig. a). The hind margin of the pronotum (collar) is 

 entirely unicolorous as in niarginata. The mesonotum is black, with a prui- 

 nose band each side at the base of the wings ; the elevated x is greenish 



CL 



yellow, and there are two conspicuous, irregularly formed (pipe-shaped) green- 

 ish yellow spots occupying its central portion (see Fig. b). The tergum is 

 black, each side broadly margined with pruinose, and the segments have their 

 posterior margins yellowish. There is also an indication of a dorsal line of 

 pruinose spots on the tergum, which in the type have been nearly worn off. 

 Beneath the head is blackish, the remainder of the insect being greenish yellow 

 and more or less pruinose. The costal margin of the fore wing is entirely 

 greenish yellow, darkened beyond the middle, and the w-mark is inconspicuous. 

 Both fore and hind wings are greenish yellow at base, with the veins darkened 

 beyond the middle. 



In genitalia Cicada cultriformis is widely different from Cicada marginata. 

 The dorsal piece is one third broader, as may be seen in the accompanying 

 figures. The uncus is rather broad with the extremity truncate ; it is more 



