60 BUTTERFLIES OF THE RIVIERA 



LARVA. On Centaurea jacea, from May to 

 September. 



M. IMdyma. 



TIMES OF APPEARANCE. May to August. 



HABITAT. Cannes, Nice, Saint-Martin-Vesubie, 

 Berthemont, and other spots. Generally distributed. 



LARVA. On Plantago, &c., from April to June. 



VARIETIES. The present species, like all of the 

 genus is very variable. 



The females, which are darker than the males, 

 range in colour from a light brown to deep black, 

 varied by a few spots of a lighter shade. This very 

 dark form most resembles the variety Meridionalis, 

 which, however, does not occur in the department. 



The other variety, which does not appear to be 

 mentioned in the local faunas, is the 

 v. Occidentalis. 



HABITAT. In South Europe it is found in the same 

 localities as the type. 



OBSERVATION. Didyma is, without doubt, the most 

 subject to variation of all the species composing the 

 genus. Staudinger, in his Lepidopteren-Liste, enume- 

 rates no less than eleven well-marked varieties. 



Specimens are found, from time to time, in which the 

 ground colour of the wings is entirely white. This condi- 

 tion is owing to the absence of pigment in the scales. 



M. r>ejone ? 



TIME OF APPEARANCE. June. 



HABITAT. In the European works, it is stated as 

 being found in " the South of France ", &c. Its occur- 

 rence in the district is, perhaps, rather improbable. 



