100 



BRIMSTONE BUTTERFLY. 



Gonepteryx Rhamni. 



PLATE V. Fig. ]. 

 Pap. Rhamni, Linn Donovan^ v. ], PI. 145. 



This insect, and a few otiiers, were first formed 

 into a distinct genus by Dr Leach, on account of the 

 peculiar shape of the wings, which are large and an- 

 gulated.* The antennae are rather short and robust, 

 thickening gradually near the summit into an obtuse 

 club : the palpi project a little beyond the head, 

 and are compressed, the radical joint longest and 

 curved, the terminal one minute and conical : all the 

 legs are perfect, and alike in both sexes ; the claws 

 bifid (PI. I. fig. 13.). Under wings grooved to re- 

 ceive the abdomen. 



The male is entirely bright sulphur-yellow above, 

 and the female greenish-white, both sexes with a 

 small round orange spot near the middle of each 

 wing, those on the upper wings being smallest, and 

 a few minute rust-coloured dots along the outer 

 edge. The under side is paler than the upper, and 

 the central spots rust-brown round the margin, and 

 • Named from yovioi an angle, and ■^rn^v? a wing. 



