in the Vicinity of Dover. S38 



brown, not black, L * C. Chrys6them<? ? L * f C. Hyale, pale clouded 

 yellow, L. C. var., white, L.* :]: 



Gonepteryx rhamni, brimstone. 



Pontiff brassicEe, large garden white. P. rapse, small garden white. P. 

 napi, green-veined white. P. Daplidic^, Bath white, L.* § P. cardamines, 

 orange tip, L. 



Leucophasia sinapis, wood-white. 



Britdnnica, under the name of Papilio Helice; a name, I believe, ori- 

 ginally given by Hiibner. It differs from the ordinary female examples of 

 Edusain no respect save in colour; being, instead of bright orange yellow, 

 of a greenish white, suffused, at the same time, on the abdomen and adjoin- 

 ing parts of the inferior wings, with a very slight tinge of sulphur colour. 

 A corresponding example of the male has never, I believe, been met with. 

 That it is to be considered a variety merely of Edusa, not a distinct spe- 

 cies, I feel satisfied from what 1 observed in the instance of the specimen 

 here figured, the only one I ever saw alive. I took it close to the town of 

 Folkstone, to all appearance but recently emerged from the chrysalis, on 

 the 3d of September. It would probably have escaped my notice, as it 

 sat with expanded wings on a flower at some distance from me, had not 

 my attention been drawn to it by a male Edusa which was flying about, 

 and, attracted by its mate, at length settled on the same spot. From the 

 bearing of the two insects towards each other, no reasonable doubt could 

 remain that they were male and female of the same species. Two very fine 

 specimens of the white clouded yellow are in the cabinet of Mr. Le Plas- 

 trier of Ramsgate. The variety is figured in Stephens's Illustrations, Haus- 

 tellata, vol. i. pi. 2. fig. 3. 



f I insert this insect with a mark of doubt, being by no means certain 

 whether the specimens I have seen (a male and female, taken near Dover, 

 and in the cabinet of Mr. Le Plastrier, Ramsgate) are any other than strong 

 varieties of Collar Edusa. They are much smaller, however, and have the 

 black marginal band broader than in that insect. Collar Chrysotheme of 

 Stephens's Illustrations, I am informed, is not the true Chrysotheme of the 

 Continental writers j which, however nearly it may approach Edusa, is said 

 by them to differ from that insect in the larva state. As the discovery of 

 truth should be the aim of all naturalists, Mr. Stephens, I trust, will excuse 

 me when I state that I hear the greatest doubts entertained on the subject 

 of Colia* Europomc, figured by him, being a British species. The speci- 

 mens to which he refers in his Illustrations as having been taken between 

 Brighton and Lewes, I am informed, were undoubtedly no other than C6- 

 lia^ Hyale. I do not mean to insinuate that so acute and experienced an 

 entomologist as Mr. Stephens could mistake the one species for the other ; 

 but, possibly, foreign examples of the true Europome may have been put 

 off upon him (as I know they have upon others), either by mistake or 

 design, as native ones captured in the above-mentioned situation. Colia* 

 Europome, I am assured, is not even a European species. 



X This pale variety, which is nearly white (see Lewin's Papilios, tab. 33. 

 fig. 3. and 4.), bears about the same relation to Hyak that Helice (white- 

 clouded yellow) does to Edusa : but, in the case of the white variety of 

 Hyale, examples of both sexes occur. Mr. Le Plastrier of Ramsgate pos- 

 sesses a beautiful series of specimens of this rare insect, taken chiefly, if 

 not entirely, near Dover. Colias Hyale appears to be a maritime fly, 

 occurring almost exclusively near the sea-coast. 



■ § A beautiful specimen of the male, in the most perfect state of preserv- 

 ation, in Mr. Le Plastrier's cabinet, Ramsgate ; taken in the meadow under 

 Dover Castle, in the month of August. Mr. Stephens also mentions his 

 having taken a specimen in the sanpie place. 



