NOV., 'o6] ENTOMOLOGICAL NEWS. 321 



I here wish to give due credit to my assistant, Mr. B. H. 

 Walden, who has assisted in gathering material and in caring 

 for the breeding cages. The photographs Nos. I, 2 and 3 of 

 the plate were also made by Mr. Walden. 



DESCRIPTION OF PLATE XIV. 



1. Longitudinal section of maple leaf stem, showing larva in burrow, 



and empty burrow partly filled with castings. Greatly enlarged. 



2. Priophorus acericaidis MacGillivray. Adult female. About three 



times natural size. 



3. Leaf stem showing exit hole of larva. 



4. Stems which have dropped from the tree. 



5. Leaves with stems severed by the borer. 



The Species of Cicada related to tibicen. 

 By Herbert Osborn. 

 The September number of Entomological News contains 

 an interesting article by Messrs. Davis and Joutel on Cicada 

 tibicen and allied forms, and I can cordially agree with the 

 authors in their conclusion regarding the separation of the 

 three forms and also agree that they are probably correct in 

 placing the names as they do, though it is a difficult matter to 

 determine just what Say had in hand for the description of 

 prninosa. The authors, however, seem to have overlooked two 

 papers in which the separation of these species has been defi- 

 nitely indicated. The first article is by Professor P. R. Uhler, 

 in the Maryland Academy of Science, Volume "1," page 151, 

 where canicularis Harris is definitely separated from tibicen, 

 but in which prninosa is still retained as a synonym of tibicen. 

 The other paper is by Professor H. Garman, in bulletin 107, 

 Kentucky Experiment Station, entitled "17- Year Locusts in 

 Kentucky," and in which he includes reference to tibicen, page 

 89, and prninosa, page 91, definitely separating these forms 

 and giving full details of characters by which to differentiate 

 them. He also gives photographic figures illustrating both 

 species. Both of these papers it must be admitted are rather 

 inaccessible and easily overlooked, but the former is referred 

 to and closely followed in Prof. MacGillivray's article on 



