120 I May, 



cludinf^ worn ones. On the night on which I took the largest number 

 (6 or 7) the lanterns had gone out for want of oil (I have since then 

 always carried a reserve bottle), but fortunately for our personal 

 safety there was a bright moon, by the light of which I boxed my 

 austraUs on the ivy blossom. Had it been dark we must have remained 

 where we were, amongst the rocks, until daylight. 



Occasionally a specimen occurs at Portland like the Surrey ones, 

 but generally the ground colour in the ,^ is whiter, which gives the 

 insect a cleaner appearance. The ? does not, so far as I have seen 

 (3 or 4 specimens), deserve much special notice, though it partakes, 

 to a slight extent, of the striking characters of the ^ . In one J the 

 chalky-white ground-colour is strongly contrasted with the sharp black 

 markings, the most conspicuous of which are a blotch between the 

 stigmata and another following the reniform, a large blotch half-way 

 between the stigmata and the inner margin, two blotches on the inner 

 margin, the usual basal and hind marginal streaks, and the zigzag 

 lines which bound the central area. The centre of the thorax is white 

 with a black streak, and each patagium has the upper part white and 

 the lower part nearly black. 



In another ^ all these black markings are indicated slightly, but 

 as a rule sharply, in black, with very faint bi'own patches in the 

 neighbourhood of the stigmata and hind margin, and the ground-colour 

 (of which much more is visible than in the first specimen) is likewise 

 pure white. A third is like No. 2, but has the black markings some- 

 what more developed, and a fourth (a great contrast to No. 2) is 

 suffused with blackish clouds all across the middle part of the wing. 

 The hind-wings of the male are very pale, especially in some specimens, 

 but not quite so white as the fore-wings. 



There are other int rmediate forms with dark clouding on the 

 costa, but I think that I have said enough to show what the species is 

 like in this locality. My desire is to breed it, but I was unsuccessful 

 with the only eggs that I managed to procure — an elastic band broke 

 and the larvae escaped. I took no females last year, and only two or 

 three males, though I was at Portland several times during the 

 autumn, twice in the company of my very energetic friend, Mr. H. W. 

 Vivian, who induced me to take him there two nights running, which 

 is rather much, even for an entomologist, considering that we spent 

 one of the days there as well, and did not get home until from 4 to 5 

 o'clock a.m. 



Monte Video, near Weymouth : 

 March Uth, 1891. 



