LAWSON: KANSAS CICADID^. 



333 



Tibicen dealboM (Davis). 



(PI. XX, figs. 1-2; pi. xxjv, fig. 10; pi. xxvi, fig. 3; pi. xxvii, fig. 17.) 

 Cicada marijinata var. dealbata Davis, Jl. N. Y. Ent. Soc, xxiii, p. 162, 1915. 

 Tibicen dealbata Van D., Cat. Hemip. N. A., p. 493, 1917. 



A large green and black species, some specimens, however, being yel- 

 lowish-brown and black. Specimens at hand measure from 32 to 37.5 

 mm., most of them averaging about 35 mm. 



Color: Head yellowish-green, with a black transverse band between 

 thj eyes which is broadened medially to touch the posterior margin and 

 the base of the front, the latter being black but with a greenish elliptical 

 spot on its upper portion. Pronotum greenish, with two irregular median 

 lines usually running from the anterior margin to the collar and en- 

 closing a broad median stripe. These black lines, however, are often 

 reduced to mere spots at the anterior margin and just cephalad of the 

 collar. Mesonotum greenish or brownish, marked with black as follows: 

 Between the arms of the W, a long posteriorly tapering line on each side 

 laterad of this which attains the posterior margin and is connected to 

 the W by a black line at about its middle, a narrower lateral stripe on 

 each side, and a large spot cephalad of the cruciform elevation which 

 sends a median process cephalad between the median arms of the W. 

 In the specimens at hand the lateral margins, the portion in front of 

 the cruciform elevation, and three short narrow stripes at the tips of 

 the arms of the W are pruinose. The abdominal terga are black with 

 the posterior margins of the segments and frequently the sides of the 

 terminal segments, yellowish or brownish. Usually there is a dorsal 

 median row of pruinose spots and the sides are strongly pruinose. The 

 wings have the veins greenish basally and brownish apically. The cross 

 veins between R:; and Rir, and between the latter and M, are usually 

 slightly darkened. The basal areoles of the fore wings are greenish 

 and the flaps are brownish while the flaps of the hind wings are more 

 grayish. Beneath the body is greenish and in fresh specimens is en- 

 tirely pruinose. The legs are also greenish but with a tendency to 

 become brown apically. 



