40 LEPIDOPTERA. 



1. G. rhamni, L. — Expanse, 2 J inches. Bright yellow 

 or greenish-white. All the wings sharply angled and with a 

 central orange spot. 



Male bright sulphur yellow, female pale greenish-white, 

 with, in both cases, a slight suffusion of blackish at the 

 base of each wing, and a small central orange spot, that 

 in the hind wings being the laruer. Margins of all the 

 wings faintly dotted with chocolate at the apices of the 

 nervures. 



Under side in both sexes similar to the upper, but more 

 greenish, the central spots reddish-chocolate with a paler 

 centre, the marginal dots more distinct. In addition, the 

 hind wings have distinctly paler nervures and a row of 

 chocolate dots before the hind margin. Antennte red. Body 

 clothed with silvery-white hairs. 



Variation in this country usually very slight. A variety 

 of the male known as var. Vhopatm, having the middle of the 

 fore wings of a deep orange colour, and common on the 

 Continent, has been recorded very rarely here — one at 

 Brighton in 1872, and one taken at Thrybergh Park, 

 Eotherham, by John Fullerton, Esq., recorded in 1860 by the 

 Eev. H. A. Piekard. Occasionally the female is found 

 having a suffusion of yellow over the central area of the fore 

 wings, and one having the under side tinged with purple 

 is noticed in the Entomologist'' s Eccurd for 1890. Mr. Goss 

 has a fine gynandromorphous specimen, and one is recorded 

 by the late Mr. J. Balding, of Wisbech, in which the wings of 

 the male side were smaller than those of the female. There 

 is another in the late Mr. Bond's collection, and a male having 

 the wings broadly striped with the pale colour of the female. 

 Mr. Webb has a female striped with the yellow of the male ; 

 Mr. S. J. Capper another ; Mr. Briggs has one so curiously 

 divided in stripes of colour that neither sex appears to have 

 a preponderance. As a crowning vagary, a specimen having 

 five wings, taken in Norfolk in 1878, was exhibited by Pro- 

 fessor Meldola before the Entomological Society. 



