TETTIGONIA VIRIDIS. 125 



each side ; these patches are contmued down to the 

 base of the frons. OcelH distmct, with two crescentic 

 marks occurring between them. Eyes pale brown, and 

 mostly spotted. Pronotmii greenish yellow, with irre- 

 gular brown spots. Legs ochreous ; claws black. Two 

 spines on each femoral tip. Tibi^ fringed with seta3. 

 No genital valve. Elytra longer than abdomen, gene- 

 rally blackish blue, but sometimes all green. A broad 

 paler blue spot, succeeded by a crescent of black, occurs 

 towards the apex. The apical end is membranaceous 

 and brown. Nervures black. Abdomen blue-black 

 and glaucous. Wings grey. 



The female is brighter than than the male, and is of 

 a fine emerald-green, with a brownish head. The 

 pronotum, scutellum, and all the elytra, green; and 

 spotted on the anterior parts with black. The costa is 

 palish yellow. The female pygofer has a crescentic 

 notch, with a bin-articulate cauda. The ovipositor has 

 several blades, two of which are serrated ; magnified 

 representations of which maybe seen in figs. 9 and 10. 



This handsome species is very common at Hasle- 

 mere, at Godalming, and in many marshy and rushy 

 parts. The variety T. arundinis, Germ., is pale, with 

 the nervures narrowly bordered with black. 



Some remarks as to the habits and the life -history 

 of this insect will be found on pages Ixvii., Ixx. of the 

 Introduction. The species is in a manner gregarious ; 

 five or six individuals congregating on the same rush, 

 head to tail, all up the stalk. They repeatedly void, 

 with some force, drops of liquid from the anus, just 

 as do many of the Aphides which secrete the honey 

 dew. 



Euacanthis interruptus, the next described species, 

 seems to live in harmony with Tettigonia, and to feed 

 amicably on the same stems. 



Length of body and elytra, 0*472 inch, or 8*5 milli- 

 metres. 



