March, 1921.] DaVIS : /ANNOTATED LtST OF COLORADO CiCADAS. 45 



Cicada dorsata Say. 



Cicada marginata Say [Tibicen niarginalis Walker of this list]. 



Cicada tibicen Linn. [Tibicen linnei (S. & G.) of this list]. 



Proarna valvata Uhler. 



Tibicen synodica (Say). 



Tibicen rimosa (Say) lOkanagana bella Davis of this list]. 



Tibicen cruentifera Uhler. 



Platypedia putnami (Uhler). 



Melampsalta parvula (Say) [A'/, calliope (Walker) of this list]. 



The reasons for dropping tibicen Linn, as far as the fauna of the 

 United States is concerned were given by Smith and Grossbeck, Ento- 

 mological News, XVIII, 1907, and the other two changes are ex- 

 plained by the writer in the June-Sept., 1919. and June, 1920, numbers 

 of the Journal, N. Y. Entomological Society. 



While there will ultimately be found just as many or even more 

 species of Cicadas in Kansas than in Colorado, the following re- 

 marks on the latter state by Gillette and Baker in their introduction 

 to the list already referred to, seem well justified : " Probably there 

 is no state in the Union offering a richer field for the student of 

 natural history than Colorado, whether it be in the line of minerology, 

 paleontology, zoology or botany. Its broad stretch of arid plains 

 crossed by streams of living water, its high mountain ranges, broad 

 plateaus, innumerable gulches and deep canons, all combine to give it 

 a most exceptional topography with a consequent diversified fauna 

 and flora."' 



A very useful paper on the Cicadidae of Kansas, by P. B. Lawson, 

 Kansas University Science Bulletin. Vol. XII, No. 2, March 15, 1920, 

 was distributed in November, 1920. It contains descriptions of 

 twenty-one species occurring in that state, also numerous figures of 

 structural details. As eleven species of Cicadas have been found both 

 in Kansas and Colorado, the paper will be helpful in considering those 

 mentioned in the present list. There is, however, a considerable dif- 

 ference in the Cicada fauna 'of these two adjoining states, and it is 

 always of interest to note the changes that take place in animal life 

 as the one hundredth meridian is approached. 



I. Tibicen linnei (Smith and Grossbeck). 



Figured in Journal, N. Y. Entomological Society, Sept.-Decem- 

 ber, 1918, PI. 7, fig. I. 



