1908. I 



81 



p. 556) that this is a variety of fieberi, I mav say that I find nothing 

 in the insects themselves which would justify this view. As they 

 both live in coast-marshes I would not be surprised to find fieberi 

 and livida together, but, as a matter of fact, T did not ; the former 

 occurred in great numbers by sweeping Pol//poqon monspeliensis and 

 other grasses, and was quite mature in August ; the latter, a much 

 darker and more robust-looking insect, occurred sparingly on October 

 18th, when there were still nymphs of it about, at a place a few miles 

 distant, and quite unaccompanied by fieberi. 



DlCRANEURA LUTEOL A , Fieb. 



In his catalogue of 1872, Fieber has Notus luteolus, Fieb., from 

 " Anglia " only ; Douglas and Scott in their catalogue of 1876 make 

 no mention of that species, and it is clear from the synonymy given 

 under Erythria citrinella, the name used for luteolus, Fieb., in Cicad. 

 d'Eur. (Typhlocybini), p. 5, that variata, Hardy, was intended. 

 Puton and Oshanin, however, both give luteola, Fieb., as a distinct 



species. 



FImpoasca, Say (Kybos, Fieber). 



It has long been evident to me that our species of Empoasca 

 which lives on poplars is different from the one which lives on alders, 

 willows, &c, and Mr. E. A. Butler has lately sent me a third, which 

 he found on Salix repens on the Towyn and Pendine burrows on the 

 Welsh coast. 



The index characters of the three species are as follows : — 



1 (2) Claval suture fuscous. Both rows of bristles in the outer series on hind tibiae 



whitish, arising from dark points. Third wing-vein much darker than the 

 second. S ■ lower distal angles of the anal lobe produced into a large, 

 broad, flat, curved horn, which is directed inward and forward. ? : last 

 ventral segment produced in the middle into an oblong tube about half as 

 long as the segment and notched at the tip ; bristles in the rows on the 

 lower side of pygofer white smaragdula, Fall. 



2 (1) Claval suture concolorous. 



3 (4) Dorsum of elytra concolorous, or at most suffusedly fuscous. Both rows of 



bristles in the outer series on hind tibiae whitish, arising from dark points. 

 Third wing-vein not darker than the second. $ : lower distal angle of the 

 anal tube produced into a large, thin, sickle-shaped horn, which is directed 

 inward and forward. ? : last ventral segment pentagonal, the distal half 

 produced into a triangle, of which the apex is broadly rounded and entire ; 

 bristles in the rows on the lower side of pygofer white. Lives on poplars 

 (P. tremula, P. canescens, P. serotina) populi, n. s. 



4 (3) Dorsum of elytra with a broad determinate fuscous stripe. Upper row of 



bristles in the outer series on hind tibiae black or blackish. Third wing- 



