LAWSON: KANSAS CICADID^:. 325 



Tibicen resonans (Walk.). 



(PI xix. fisjs. 3-4: pi. xxiv, fig. 6; pi. xxvi, fig. 13; pi. xxvii, fig. 9.) 

 Cicfiila rrxonanx Walk.. List Honiop., i, p. 106, 1850. 

 Cicada resonanx Davis, Jl. X. Y. Ent. Soc., xxiii, p. 6, pi. 1, fig. 2, 1915. 

 'fibii-,-,1 reionqnt Van D., Cat. Hemip. N. A., p. 493, 1917. 

 Tibicen resonans Davis, Jl. X. Y. Ent. Soc., xxvi, p. 148, 1918. 



A ferrugineous and black species of large size. Specimens at hand 

 measure from 38 to 40 mm. 



Color: Head black, with ferrugineous spots as follows: Along the 

 antennal ledges and on to the eyes, a median and two lateral spots at the 

 base of the front, and irregular marks along the posterior margin laterad 

 of the lateial ocelli to the eyes. Pronotum mostly ferrugineous with the 

 grooves, an almost continuous line along the anterior margin, parts of 

 the lateral margins and other variable spots, black. Mesonotum ferrugin- 

 eous with black spots as follows: Between the arms of the W, a usually 

 smaller spot on each side laterad of this, a spot along each lateral margin, 

 and a large transverse spot cephalad of the ferrugineous cruciform eleva- 

 tion which has a slender anterior process reaching between the median 

 arms of the W. The wings have the veins entirely ferrugineous as are 

 the basal areoles of the fore wings. The cross veins between R, and be- 

 tween Ri--. and between the latter vein and Mi are clearly but not strongly 

 darkened. The flaps of both wings are grayish or buff. The abdominal 

 terga are black. Beneath the insect is dark brown or ferrugineous with 

 the opercula lighter. The specimens at hand are partly pruinose. The 

 legs are ferrugineous. 



Form: The following are the measurements in millimeters of the 

 specimens at hand: 



Length of body 38 to 40 



Width of head 17 to 17.5 



Expanse of fore wings 115 



Greatest width of fore wing 15 



Greatest width of operculum 8 



Greatest length of operculum 8 



Opercula, excluding extension beyond the coxal cavity, broader than 

 long, overlapping for a short distance medially, the posterior margins 

 forming a broad and nearly regular curve. 



Genitalia: Supia-anal plate of male with a broad but shallow median 

 emargination which bears a broad and short but distinct median tooth 

 which is shorter than the lateral angles. The uncus, when viewed later- 

 ally, is broad basally, narrowed medially, and then expanding apically 

 much like a horse's foot. Viewed caudally it is broader than long, 

 slightly narrowing to the broad, truncate apex. The ventral piece is 

 strongly U-shaped, its arms turning strongly laterad apically. The last 

 ventral segment of the male is distinctly less than twice as broad as long, 

 the lateral margins regularly narrowing to the broad truncate apex. The 

 pygofers of the female have an acute median tooth which distinctly ex- 

 ceeds the lateral angles. Last ventral segment of the female with sinuate 

 lateral margins, the posterior margin broadly and angularly emarginate 



