342 THE UNIVERSITY SCIENCE BULLETIN. 



Subfamily TIBICININ^ (Dist.). 



The members of this subfamily differ from those of the pre- 

 ceding in that the males do not have any tympanal coverings 

 at all. In the main they are small to medium sized forms. 



There are four genera of the Tihicininse represented in our 

 Kansas fauna. These may be separated by the following key : 



KEY TO GENERA 



A. Cells of median area of fore wings distinctly longer than marginal 

 cells. 

 B. Head about as broad as base of mesonotum. Opercula nearly 

 touching medially. Tibicina. 



BB. Head distinctly narrower than base of mesonotum. Opercula 

 widely separated. 



C. Median transverse suture of elytra not very evident. 



Okaiiagana. 



CC. Median transverse suture of elytra very evident. 



Tibicinoides . 



AA. Cells of median area of fore wings not distinctly longer than mai'- 

 ginal cells. Melampsalta 



Genus TIBICINA Kol. 



The tympanal coverings are entirely absent in this genus, in 

 this respect agreeing with the following three genera. It dif- 

 fers from them, however, in having a relatively broader head 

 which is as broad as the base of the mesonotum. Added to this 

 is the characteristic of the opercula which nearly touch me- 

 dially. As in the two following genera the cells of the median 

 area of the fore wings are distinctly longer than the marginal 

 cells. 



The single member of the genus and its variety occur in the 

 state. Only the 17-year race has been definitely recorded from 

 within our borders though the 13-year race comes so close in 

 Missouri that it would be surprising if it did not extend west- 

 ward over into the state. 



Tibicina septendecim (Linn.) . 



(PI. xxiii, figs. 9-10; pi. xxv, fig. 5; pi. x.wi, fig. 14; pi. xxvii, fig. 19.) 

 Cicada septendecim Linn., Syst. Nat., edn. 10, i, p. 436, 1758; edn. 12, ii, p. 708, 1767. 

 Tettigonia septendecim Fabr., Syst. Ent., p. 679, 1775. 

 Tettigonia costalis Fabr., Ent. Syst., Suppl., p. 516, 1798. 

 Cicada septendecim Germ., Thon, Ent. Archiv., ii, p. 4, 1830. 

 Cicada septendecim Harris, Kept. Ins. Mass., p. 167, 1841. 

 Cicada septendecim Harris, Treat. Ins. Inj. Veg., edn. 2, p. 180, 1852. 

 Cicada septendecim Jag., Life of N. Am. Ins., p. 64, 1859. 

 T-ibicen septendecim Stal, Ann. Soc. Ent. Fr., ser. 4, i, p. 618, 1861. 

 Cicada septendecim Harris, Treat. Ins. Inj. Veg., edn. 3, p. 206, 1862. 

 Cicada septendecim Ril., 1st Mo. Kept., p. 18, 1868. 



