204 [September, 



As already indicated, this insect is an inhabitant of midland and 

 southern England and S. Wales. I have records of its occurrence in 

 23 English counties and in Carmarthen and Grlamorgan. But strangely 

 enough, though so conspicuous an insect, it is omitted from Dale's list 

 for Glanvilles Wootton, and though 1 have myself collected for some 

 time in Dorsetshire I have not taken it in that county, though it occurs 

 in Hampshire on the one side and in Devon on the other. It is, no 

 doubt, unsafe to argue from negative evidence like this that the insect 

 is really not present in the county, especially as its life in the perfect 

 state is such a very brief one, and visiting collectors might miss it by 

 being present at the wrong time of the year ; but such an argument will 

 not exjjlain its absence from the Glanvilles Wootton list, which represents 

 Mr. Dale's work for many years and for all the year round. In the 

 Alps this species may be found up to the height of 3000 feet. 



3o Kyrle Road, 



Claphain Common, S.W. 11. 

 August 9th, 1922. 



A GENEEIC ARRANGEMENT OF BRITISH JASSINA. 

 BY JAMES EDWAEDS, F.E.S. 



The subject-matter of this paper forms part of a long over-due 

 revision of the systematics of the British Cicadina, which is now nearing 

 completion. It is published in advance in order that it may be available 

 for use in a re-arrangement of British Cicadina now in progress in a 

 Government Museum. For this purpose a statement of index-charactei's 

 and a list of the species dealt -with has been considered sufficient to indi- 

 cate the categories intended, leaving extended definitions and discussion 

 of the characters employed for another occasion. It is believed that the 

 genera used, with the possible exception of Sficiocoris J. Sahib., of 

 which only the two British species, prei/ssleri and Jlaveol a, Avere avail- 

 able for study, represent homogeneous natural categories ; which is 

 hardly the case with such terms as Athysanus, Thamnotettix, and 

 Deltoceplialus as commonly applied. 



Hardya bears considerable superficial resemblance to DeltocepltaU 

 of the ptclicar/s-gron'p, but a different line of descent is indicated not 

 only by the want of the cross-vein intermediate m-cu in the elytra, bvit 

 also by the form and direction of the male genital plates. In the 

 majority of our Jassina the male genital plates lie in approximately the 

 same plane as the valve and form the two halves of a common, usually 



