LAWSON: KANSAS CICADID.^. 318 



Systematic Treatment of the Kansas Species. 



Van Duzee in his catalogue has divided the Cicadidse into 

 three subfamilies, each of which is represented by one or more 

 genera in Kansas. The following is his key to these sub- 

 families : 



KEY TO SUBFAMILIES. 

 Tympanal covering's present in the male, 1. 

 Tympanal coverings absent in the male. 



Subfamily 3 Tibicininie (Dist.) 



1. Tympanal coverings entirely concealing the orifices. 



Subfamily 1 Tibicenmse Van D. 



Tympanal coverings imperfect, lea\'ing the orifices more or less ex- 

 posed. Subfamily 2 Cicadinse Van D. 



Subfamily TIBICENIN^ Van D. 



The members of this subfamily are distinguished from those 

 of the other two subfamilies by having the tympanal coverings 

 entirely concealing the tympanal orifices. Most of our cicadas 

 belong here. 



The genus Tibicen is the only genus belonging to the Tibi- 

 ceninse that is represented in our Kansas fauna. 



Genus TiBlCEN Latr. 



This genus contains species that vary much in size, ranging 

 from very large to rather small forms. They all, however, 

 have characteristically broad heads and their opaque abdomens 

 taper regularly behind. The mesonotum completely covers the 

 middle of the metanotum and the tympanal orifices of the male 

 are completely hidden by the tympanal coverings. The oper- 

 cula are large and usually are close together or overlap me- 

 dially. 



This is by far the largest genus in Kansas, fourteen of the 

 twenty-one species of the state belonging here. These may be 

 separated by the following key : 



KEY TO SPECIES. 



A. Large, heavy bodied species; uncus simple. 



B. Uncus distinctly longer than broad, not triangular. 

 C. Uncus long, slender and curved, bifid apically. 



bifida. 



