-58 1 March, 



NOTES ON THE GENUS CHLORIONA, Fieber ; WITH DESCRIPTION 

 OF A NEW SPECIES. 



BT JAMES EDWAEDS, E.E.S, 



In tbe course of a recent review of my material in this genus I 

 found that we have in this country a third species, which has not, so 

 far as 1 know, hitherto been recognised ; and also that one of our two 

 known species has been wrongly identified. The object of these notes 

 is to put matters straight with regard to our native species, and with 

 the view of rendering them more useful, I have included a notice of 

 all the described European species. 



No species of this section of the old genus DelpJiaoc appears to 

 have been known to the Eev. T. A. Marshall at the date of his "Essay 

 towards a knowledge of British Homoptera " (Ent. Mo. Mag., ser. i, 

 vol. i, p. 199, Feb., 1865) ; but Scott {op. cit., ser. i, vol. vii, p. 25, 

 July, 1870) introduced two species, the macropterous males of which 

 he distinguished as follows: — 



Greenish-grey ; abdomen black, genital segment yellowish-white... 



smaragdula, Stal. 

 Green; abdomen and genital segment black unicoJor,'S..-^. 



I have not seen any of Scott's specimens, and the above parti- 

 culars do not, unfortunately, enable one to decide with certainty what 

 species he had before him. 



In my Synopsis of British Homoptera-Cicadina (Trans. Ent. Soc. 

 Lond., 1886, p. 58) I dealt with the two British species then known to 

 me, retaining the names used by Scott, and separating them by the 

 characters employed by J. Sahlberg, and so the matter remained. 

 The species resemble one another very much in facies, and Dr. 

 Melichar (Cicadinen von Mittel-Europa, 1896, p. 63) says that they 

 are only to be distinguished from each other by the form of the face. 

 The differences in the proportions of the face, however, are, for me, 

 very difficult to appreciate, and in practice I find that characters 

 taken from the male genitalia are much more satisfactory : this seems 

 also to have been the experience of Fieber. 



As the male anal tube in particular affords more prominent cha- 

 racters than usual, it is necessary that its structure should be thoroughly 

 understood ; and the fact that it is capable ot considerable vertical 

 motion must be borne in mind. It is furnished on each side of its 

 lower edge with a large pointed tooth, which is always morje or less 

 cephalad in direction, and in most species, when the posterior face of 

 the anal tube is vertical, lies parallel to the long axis of the body, and 



