• ATHYSANUS. 26 



are seen best in profile. Abdomen black above, with 

 yellow sides. Beneath yellow, with a central black 

 stripe. 



Size, 0-12 to 0-14 inch, or 3-00 to 3-50 millimetres. 



Several specimens of this insect, hitherto rare in 

 England, were obligingly sent to me by Dr. A. Piffard, 

 who captm^ed them at Brickett Wood, Hertfordshire, 

 in August, on Genista anglica. Taken also at Cisbury, 

 and in Arundel Park, resting on the common burnet. 

 Also found on the hills round Tring. 



Sahlberg describes four species as indigenous to 

 Sweden. Fieber included all these insects under the 

 genus Thamnotettix. 



Genus XXXVI.— ATHYSANUS,* Burm. 



Body robust. Head obtuse in front. Clypeus wide. 

 GulaB broad, reaching to the base of the clypeus. 

 Frons three times broader at the summit than at its 

 base. Pronotum anteriorly semicircular. Elytra with 

 at least five apical cells. Limbus very small or none 

 at all. Legs quadra-prismatic, each edge furnished 

 with setae. 



The genus Athysamis, as described by Burmeister 

 and by Fieber, does not furnish very sharp characters 

 for separation from Deltocephalus and its near allies. 

 Stress has been laid on the straight inferior edge of 

 the elytron ; but this character is governed by the fact 

 of the presence or absence of the appendix or limbal 

 flap, such as will form an effective closure to the elytra 

 on the insect's back, and show it to be more than a 

 mere thickened rim to the margin. Eestricting the 

 genus to such as have no such protective and true 

 limbus, the nine British examples may be described as 

 follows. 



Dr. John Sahlberg, in 1871, described no less than 

 sixteen species of Scandinavian Tettigidae belonging to 



* From a. and 6yo-«vo?, ftingeless. 



