354 Annals Entomological Society of America [Vol. XV, 



study of the sub-family CicadellincB, but since its date of publi- 

 cation a number of changes have been made and some addi-. 

 tions have been found of which no records have been made; 

 these changes and additions have all been included in this paper. 



Van Duzee, 1916 and 1917, has been followed in the higher 

 names, viz. : Family CicadellidcB, sub-family CicadellincE, tribe 

 Cicadellini, and genus Cicadella, as neither literature nor time 

 was available for the checking-up of this. 



This genus can be recognized by the two ocelli placed on the 

 posterior half of disk of vertex, about equal distance between 

 eyes and center, portion of the front encroaching upon the dor- 

 sal part of vertex, the ledges over the antennal sockets are not 

 prominent and the anterior tibia are not sulcate. Distant, 1908, 

 mentions, in separating it from Kolla, that "the lateral margin 

 of the vertex in line with the inner margins of eyes." This is 

 rather misleading, and there is no doubt that what he meant 

 was that the lateral margins were not in line with the outside of 

 the eyes, as they are in Kolla. 



A number of suggestions have been made ; the very first one 

 is to consider Cicadella viridis Linn^us as a possible accidental 

 introduction which did not become established on this continent. 



In the study of hieroglyphica, the writer "struck a snag" in 

 trying to recognize the species from the short and incomplete 

 description by Say. On this particular point the author sought 

 advice from other interested friends. 



The answers received were varied, both concurring and con- 

 trary to a suggestion of the author. But, as it is exceedingly 

 difficult to prove or disprove the questions that arose, it is 

 better left as it is for the present. It is rather unfortunate 

 that Say's type is not in existence; if it were, there would never 

 have been the slightest doubt, but, as it is, his short description 

 will answer for another species in this genus as well. 



Cicadella confluens Uhler has been given specific rank, for 

 the reason given in the article, and the figure will assist in 

 explaining doubtful points. Consequently, Ball's variety 

 uhleri has been shifted to be a variety of co?iflue?is. 



Tettigonia compta Fowler, 1900, has been revived as a sub- 

 species, a rank to which it seems surely entitled. It appears to 

 have a different form of habitation, seeking the higher and more 

 arid regions of Mexico. This, together with its great difference 

 of appearance will warrant the designation of sub-species for it. 



