mon of our Butterflies, the caterpillars of many of them being 

 the greatest pests amongst our vegetables, by feeding upon 

 and destroying the different varieties of cabbages cultivated in 

 our kitchen gardens. 



As the Genus now stands, it may be divided into those with 

 the wings rounded, P. Brassicce L.; Rapce L.; Napi L.; — the 

 others having the wings variegated beneath, P. Cardamiyies L.; 

 Daplidice L, : the palpi of the first division have the terminal 

 joint longer than either of the other joints ; whereas the ter- 

 minal joint is shorter than the second in the two species of 

 the second division, and P. Cai^damines has two additional 

 nerves extending to the costa of the superior wings. P. Si- 

 7iapis I have ventured to remove from the Genus Pontia, the 

 form of the wings as well as the total disagreement of the 

 nerves rendering such a step necessary ; and I am borne out 

 by the extraordinary difference in the palpi, which are short, 

 flat, the first joint being very large, conic, second small, qua- 

 drate, the third very small, nearly globose. Although I have 

 availed myself of the inimitable and elegant dissections of 

 Mons. Savigny to illustrate the subject, it has not been done 

 without the most careful comparison of them with nature ; and 

 I shall take advantage of this opportunity of correcting an 

 error in his first plate, the figures relating to P. Daplidice 

 being numbered 2. instead of 3. which error is carried 

 through the plate. 



Pieris Daplidice, like many other insects, seems to be peri- 

 odical in its appearance. It was taken in the days of Ray, 

 by Vernon near Cambridge ; by Petiver, near Hampstead : 

 Lewin also notices it as British. By its trivial name we may 

 infer it has been taken near Bath ; a faded specimen was taken 

 in June 1802, in WhitewoodnearGamlingay, Cambridj^-eshire, 

 by the late Dr. Abbott ; and another (a female), upon the 

 heights near Dover Castle, August 14, 1818, by J. F. Ste- 

 phens, Esq. to whom I have to acknowledge my obligations 

 for the loan of the specimen figured, and also for the hand- 

 some manner in which he has in this as upon all other oc- 

 casions rendered me every assistance in the progress of this 

 volume. 



Godart in the Encyclopedie Methodique informs us that 

 " P. Daj)lidice is very common in Europe. It inhabits woods, 

 and meadows particularly : it first appears in April and May, 

 and afterwards in August. The caterpillar feeds upon many 

 species of cabbage, upon Reseda lutea, and according to Hlib- 

 ner upon a wild Mustard, the seeds of which it eats. Its 

 body is of an obscure blue embroidered with yellow and 

 spotted with black; its head is of a light green with yellow 

 spots and black dots. The chrysalis is greenish or ash-coloured, 

 accordino; to the age." 



Reseda lutea (Base Rocket, or Wild Mignonette) is figured 

 with the insect. 



