BRIMSTONE. 69 



of the two species of Buckthorn (Ehamnus Frangula 

 and JR. Catharticus). When examined with the micro- 

 scope, these are found to be very pretty objects of 

 conical form, with sculptured ribs on the sides. 



The caterpillar that results from these, when it grows 

 up, is of a fine green colour, shagreened over with black 

 points, and shading off into a paler line along the side. 

 Its shape is represented at Plate I. fig. 2. It is found 

 on the young buckthorn foliage that forms its food. 



The chrysalis is of the remarkable shape shown on 

 Plate I. fig. 13, green, marked with yellow. It remains 

 in this state for about twenty days, when the perfect 

 butterfly appears. 



The general colour of the male Brimstone Butterfly 

 is a clear, brilliant yellow, much like that of the Daffodil, 

 its contemporary ; and in the centre of each wing is a 

 small spot of rich orange-colour. A very beautiful 

 feature to be remarked in this butterfly is the silken 

 mane, so to speak, composed of long hairs of silvery 

 gloss and whiteness, which are arranged as if cqnibed 

 up from the sides of the thorax, so as to meet in a 

 crested form over the top. 



The female chiefly differs from the male in the ground 

 colour of the wings, which are of a pale and very pe- 

 culiar greenish white tint, rather more deeply tinged 

 with yellow at the extremities of the wings. 



As the male, from his colour, bears the name of 

 "Brimstone," or "Sulphur," the complexion of his 

 mate may be accurately compared to the tint of another 



