158 Dr. T. A. Chapman o?^ 



rests on the possibility that it may assist in elucidating 

 those instances of British melanism that seem outside the 

 main stream, due to darkening of objects by deposited 

 carbon. 



In the imaginal state the three races I have (the fourth 

 from Paestum is very close to that from Capri, but being 

 represented by only one specimen does not admit of further 

 discussion) differ materially from each other. The Capri 

 race, of which I have 12 specimens, are very pale, var. jm/- 

 lens, of a very light straw colour, and the hind wings with 

 no dark suffusion, are almost to be called white, the black 

 spot very small, about normal in one specimen, and curi- 

 ously even a little extended in another, which is otherwise 

 one of the whitest. Tlie Sicilian race, of which I have 

 about 170 specimens, is decidedly darker than those from 

 Capri. About 16 or 17 (10 ^) are practically indistinguish- 

 able, but the majority have the hind wings fuscous and the 

 fore wings a darker straw colour, i.e. with just a trace of 

 orange. The greater part of these are paler than the 

 similar form from Hyeres, there is, however, one Hyeres 

 specimen (at least) that would mix indistinguishably with 

 them. A further but very small number make a fair 

 approach to what may be called the ordinary or typical 

 Hyeres form, which is at once rather redder and greyer 

 than the mass of the Sicilian. 



Then there are a certain number that present variation 

 in the black markings, the tendency is rather (as compared 

 with Hyeres specimens) to smallness of the black spot, and 

 a few have it absent or represented by an odd scale or so 

 only. These are not necessarily the palest specimens, one 

 with perhaps the least trace of spot (if any) is one of the 

 darker orange specimens. The lighter and least spotted 

 specimens are more numerous amongst the females. 



There are only about 6 specimens (4 ^) showing exten- 

 sion of the black spot ; whilst about 20 /^ (of the pale 

 form) from Hyeres show this variation. 



Hardly any show the row of dark points along the inner 

 margin, and a smaller proportion show the dark scaling 

 over the wing that usually takes the form of dots on the 

 outer part of the wing, but several exceed in this respect 

 any I have from Hyeres (figs. 7 and 8), with black mark- 

 ings distributed over the whole wing ; probably the larger 

 number of specimens present the greater range of 

 variation. 



