150 L December. 



with reference to the genitalia, because in commutatus, Fieb., the 

 genital plates so far from being elongate, are very short, so short in 

 fact as to leave the inner genital processes exposed. 



The species to be included in the genera Thamnotettix, Limotettix, 

 and Athysanus, as defined above, will be as follows : — 



Thamnotkttix : dilutior, 'Khm., prasinus,'P&\\., subfusculiis, Yall., stupidula, 

 Zett., striatula, Fall., cruentata, F&nz., torneella, ZQii.,splendidula,F., crocea, H.-S., 

 attenuata, Germ. 



Limotettix : striola, Fall., intermedia, Boh., nigricornis, J. Salilb., 4:-notaia, 

 Fab., virescens. Fall., frontalis, H.-S. 



Athysanfs : hrevipennis, Kbm., grisescens, Zett., sordidus, Zctt., rtisi-eolus, 

 Fall., irroratus, Scott, piceus, Scott, obsoletus, Kbm., plebejus, Fall., obsciirellus, 

 Kbm., melanopsis. Hardy. 



Preysshri, H.-S., belongs to a group which differs so much from 

 all the other species that I have thought it better to retain it in Thom- 

 son's genus Stictocoris, rather than to tack it on to Aihysanus. I may 

 shortly send a descriptive notice of T. stupidula to this Magazine. 



Swiss Cottage, Rupert Street, Norwich : 

 9th November, 1883. 



NATURAL HISTORY OF ZTO^NA EXULANS. 

 BY WILLIAM BUCKLER. 



When Dr. F. Buchanan White, in company with Prof. J. W. H. 

 Traill, in July, 1871, discovered this to be a British species located on 

 a hill in Braemar, as related in this Magazine (vol. viii, p. 68), he 

 very kindly sent to the Rev. J. Hellins, and to me, some eggs at 

 the beginning of August following. 



The larvae hatched on August the 8th, and in absence of any 

 knowledge of the nature of their food, were tried with heather and 

 other low plants, but they chose to eat only of Lotus cm'tiiculatus, and 

 throve on it, moulted once, and fed on again till the 8th of September, 

 when they fixed themselves for hibernation ; but in course of the 

 ensuing winter they were unfortunately attacked by mould, and 

 perished one after another, the latest in February, 1872 ; and I have 

 since learned from Mr. Hellins that his had met with a similar fate. 



IS'atui-ally enough, as time went on I hoped the full grown larva 

 would eventually be found, and its local food plant ascertained with 

 certainty, in its nortlit'ru habitat, by some enterprising collector who 

 would perhaps afford me the opportunity of figuring it ; although 

 this has not happened from Braemar, yet now, after the lapse of eleven 



