114 BOTYS PANDALIS. 



the pot ; but next day I noticed one larva had attacked 

 a leaf of Solidago by eating a small hole partly through 

 it ; subsequently other leaves were similarly eaten 

 into, and by the beginning of July they evidently pre- 

 ferred the golden-rod and marjoram." 



With this account Mr. Jeffrey kindly forwarded to 

 me a dozen of the larvae on the 3rd of July, just as 

 they had completed their first moult, and were then 

 not quite a tenth of an inch long, having a glossy 

 black head and collar-plate, a whitish pellucid skin, 

 bearing blackish-brown dots, and a broad yellowish- 

 green internal vessel showing through. 



On the 8th of July I found they had moulted for 

 the second time and become less transparent, except- 

 ing the belly, which remained much as before though 

 slightly yellower, while the body above was darker 

 and rather dingy green, the head, the plate, and dots 

 shining brownish-black. 



They lived contentedly, but well apart from each 

 other, and when preparing for the third moult spun 

 little hammock-shaped silk webs on the under-side of 

 the leaves, or between leaves, slightly uniting the 

 surfaces. 



After the third moult, on the 17th of July, I was at 

 first astonished at not seeing the larvae, until I became 

 aware that they were inhabiting little cases, which 

 they had made for themselves with portions cut from 

 the leaves of their food-plants ; some of the cases 

 were lying loose among the leaves, though one or two 

 at first were still adhering to the leaves by a small 

 part not cut away ; on turning out a larva two days 

 later I saw its back and sides were deeply tinged with 

 dark purplish-brown. 



Henceforward the larvae were not easily observed, 

 as they were exceedingly shy, never protruding their 

 heads to feed during the day, unless in darkness and 

 perfectly undisturbed ; they evidently fed well, and 

 made fresh cases whenever they required roomier 

 abodes, or those in use changed colour from decay; 



