240 THE ENTOMOLOGIST. 



numbers, the females measuring over 50 mm. across the wings ; 

 with them were M. jihcehe var. occitanica, easily recognized on 

 the wing by its more powerful flight. Eventually, coming in 

 my direction, I saw, about 10 o'clock, a yellowish white butterfly, 

 which I knew could only be the much-desired Granada speciality; 

 this I managed to net, but to my great disappointment it was 

 worn to rags. Mr. Tylecote had found Z. var. meridionaUs just 

 coming out at the end of April, 1904, and yet only ten days' 

 later in the year I now found that I was too late for it at its best. 

 However, having found one specimen I soon came across more, 

 and by noon had netted seventeen, of which only nine were cabinet 

 specimens. The next day I tried the Genii valley again, taking 

 much the same species as on my first visit, and netting sixteen 

 Z. var. meridionaUs, of which only seven were of any use May 

 10th I tried higher ground on the way to the before-mentioned 

 plateau, and here I found a spot which contained some good Z. 

 var. meridioncdis and captured ten good specimens. On the 11th 

 I again visited this spot, but only obtained three, and, except for 

 single females on the 13th and 15th May, I did not again see 

 the species. It seems evident, from my experience, that the 

 best time at Granada for this elusive insect is the first week in 

 May, and that it is only a very short time on the wing. 



Z. var. meridionaUs at Granada chiefly haunts patches that 

 have not been cultivated for a year or so, thus allowing a luxu- 

 riant growth of a yellow crucifer which is very like Sijiajns 

 arvensis. I saw females depositing ova on this plant, and fed a 

 larva on it for several days until I left Granada. After this I 

 found it would eat the flowers of any yellow crucifer I could find. 

 This larva survived until it reached the third stage, and was 

 then light pea-green in colour with a black head, and the seg- 

 ments thickly covered with small black spots. The ovum is of 

 the usual Pierid shape ; when first deposited amongst the flower- 

 buds of its food-plant it is light green, changing in a day or so 

 to orange. 



The males have a swift steady flight, and are not particularly 

 difficult to capture. They are easily distinguished from the 

 numerous Pierids amongst which they fly by their yellowish 

 tint ; the females, which fly much more slowly, in consequence 

 of the less amount of yellow are much more difficult to dis- 

 tinguish. 



On the first occasion I visited the plateau overlooking the 

 Darro gorge I found, on the way up, in addition to Z. var. 

 meridionaUs, Pyrgus sao frequently, apparently the Central 

 European form, and showing no approach to the var. therapne, 

 which is said to be the form occurring in Andalusia, and which 

 I had taken in Corsica in 1906. In the small gorge to the left 

 of the road Euchloe euphonides was abundant and in fine con- 

 dition. The Andalusian E. euphonides interested me greatly ; 



