March, I9i6.] DaVIS : CiCADAS FROM THE UNITED StATES. 



59 



A male Cicada erratica from Shreveport, La., kindly loaned by 

 Prof. Herbert Osborn, its describer, is also figured. It is one of the 

 seven males from which the original description was made and the 

 figure here given of the genitalia will further serve in identifying the 

 species. The genitalia of this insect is like that of the three much 



Cicada enaticoL 



smaller males from Indiana, mentioned above. We have a number 

 of specimens of erratica from Logtown, La., June (E. S. Tucker, 

 La. Agri. Exp. Sta.) ; Palmyra Island, about thirty miles below Vicks- 

 burg, Miss., June (R. N. Lobdell) ; xA.gri. College, Miss., July (H. E. 

 Cox), and Scotts, Ark., August (John M. Moose, Jr.). The last three 

 were kindly sent to me by Prof. R. W. Harned, to whom I am in- 

 debted for many cicadas. In the collection of the U. S. National 

 Museum there is a female from Alexandria, La., June 22, 1910 (E. 

 S. Tucker), and Prof. Harned has a specimen collected at Rose- 

 bloom, Miss., in August, 191 5. 



From present information we think that these related insects 

 should be arranged as follows: 



Species with first and second cross veins infuscated. 

 Cicada olympusa Walker, 1850. 

 Cicada milvus Walker, 1858. 

 Cicada sordidata Uhler, 1892. 

 Cicada texana Davis. 

 Species with clear wings. 



Cicada eugraphica Davis. 



