242 THE entomologist's record. 



Plan di Mugnone, a low region distant only six kilometres from 

 Mount Morello, and being on the contrary, quite similar to those 

 collected by him in August on Mount Fanna. 



In the succeeding year 1915, my wife and my daughter, hunting 

 every day in the Pian di Mugnone to establish the dates of the 

 emergence of all the Florentine butterflies, we were able to form 

 numerous series of A. coridon of the vernal season. Afterwards they 

 went to hunt on the Pratofiorito mountain, above the Baths of Lucca, 

 whilst I continued to search in Pian di Mugnone and collected a small 

 series of the summer A. coridon. 



On the Pratofiorito mountain A. coridon was found in a form 

 rather like the one of Mount Morello, but absolutely different from the 

 summer form I was hunting in Pian di Mugnone. 



In the winter of 1915, Dr. Verity, having at his disposal an 

 immense series of A. coridon of the Sibillini mountains, of Mount 

 Morello, of the Pian di Mugnone, of Pratofiorito and other localities, 

 undertook the study of the phylogenetic characteristics and discovered 

 that certain characteristics common to nearly all the specimens of the 

 Pian di Mugnone were wanting in those of other localities and 

 vice -versa. 



One night, tired out by the work of analysis, in which I was 

 helping, we began to talk about the Agriades, with which we had been 

 occupied for more than two months. At a certain point Dr. Verity, 

 taking the few specimens collected by him on the Mount Fanna and 

 comparing them with the specimens from other localities, said to me : 

 " The mountain A. coridon has one generation only, that of the plain 

 has two. On Mount Fanna the form of the plain is found in spring 

 and in late summer while the mountain form is found at the beginning 

 of summer, therefore there are two quite distinct species." 



Surprised and fascinated by the discovery of my young master, 

 I had to confess that there was nothing to say against his reasoning 

 although the two species appeared almost identical. 



In the article published in Vol. Ixxxiv — year 1915 — page 514 of 

 the " Annales de la Societe Entomologique de France," Dr. Verity 

 indicates the specific differences, which now appear to me so evident 

 that I am surprised that the specific double form of the two Agriades, 

 confused under the name of A. coridon, was not recognised sooner. 



I thought it right that Dr. Verity should name the new species 

 discovered by him as florentina, but he made me observe that the 

 Italian form with two generations was specifically identical with the 

 Spanish form called arraqonensis by Gerhard, and he decided to keep 

 this name for the entire species, notwithstanding the error in 

 orthography. He wrote in fact arr&gonensis, and I, having copied his 

 manuscript for the press, have always written the name with double r, 

 and I dont understand how it came to be printed with one r only, thus 

 giving rise to inconveniences which Dr. Chapman has recently deplored, 

 because the name of aragonensis, being no more identical with the 

 first, has remained fixed for ever in literature and can never be 

 substituted by another more appropriate, thus giving rise to confusion 

 with the preceding name of arragonensis. (Note. See page 256.) 



Though convinced of the specific double form, I wished, not being 

 able to undertake the breeding from the larva, to obtain biological 

 facts from field experience, so precise as to acquire absolute certainty, 



