6 [June, 



until the coast, from Lancashire to Hampshire, has been thoroughly 

 examined : not for a week or fortnight only, but during the whole of 

 August and September at least, if the larva of D. euphorhiae be as 

 irregular as that of its near kinsman, D. galii. 



In 1855, Mr. Frederick Smith found a few larvse of D. galii on 

 the sand-hills at Deal, about the middle of August. In 1856, I went 

 to Deal on the 29th of August, and a few days later, had the satisfaction 

 of being called by Mr. P. Bouchard to see a nearly full-fed larva which 

 he had found. Shortly after I found one myself; and I continued to 

 hunt for them successfully until the end of September, having by that 

 time taken about a couple of dozen. 



In 1857, I was at Deal again, but not till September ; and I found 

 no larvas until the end of the month, Avhen they began to appear, and 

 continued to do so until the beginning of November. 



In 1858, though I examined the old localities throughout Sep- 

 tember and October, I was able to procure only three — in the early part 

 of the latter month. 



In 1859, I visited Deal in the second week in August, and found 

 that, even then, I was too late for the greater portion of the brood, as 

 the very numerous patches of dried " frass " testified ; nevertheless, 

 during the remainder of August and the early part of September, I took 

 about forty or fifty specimens in this, the great galii year. 



In 18G0, I was at Deal for a fortnight in the end of August, — and 

 in 1861, for about as long, in the end of September ; but on neither 

 occasion was I able to find either larva, or " frass " to indicate that 

 there had been any ; and in 1862, in the end of August, I took the last 

 three galii larvae which I have seen, as I could find none in 1863 

 and 1864. 



Prom these statements, it will be seen that this larva may appear 

 from the beginning of August to the end of October : so that we can 

 have no certainty of meeting with it, even if we be in the right locality, 

 unless we are able to make a protracted residence in the spots where it 

 is expected to occur. 



The larva is not only irregular, but very local — capricious, one 

 would be apt to say. I have hunted all over the sand-hills from Deal 

 to Sandwich; but never found it, except from the first Battery southwards 

 as far as the large sand-hills extend, and from the sea westward for two or 

 three hundred yards. 



In 1857, and in this year only, the larva was taken by Mr. S. Stevens 

 and myself, on the shingles from Kingsdown to the vicinity of the 

 butts for rifle-practice to the south of that village,— a little more than 

 three-quarters of a mile. 



