shelter among the herbage, as no doubt they also do in very stormy 

 weather. After a sunny day the stones often feel quite warm to 

 one's hand when placed upon them, even late in the evening. I also 

 noticed that in very hot, sunny weather the moths resting on the 

 stones were very torpid, one frequently having to almost scrape them 

 off the stones into the pill-box, but that the moment they were in the 

 shade they would commence to flutter, and that, if purposely dis- 

 turbed, they would fly a short distance and then settle down again 

 on the sunny front of the stones ; also that in the afternoon in- 

 dividuals with wings still limp were frequently to be found a few 

 inches up the stones, evidently having just crawled up there from 

 the pupa. 



Although the moths sitting on the stones harmonise remarkably 

 well with their surroundings, the facts just mentioned suggested to 

 my mind that there might be other reasons for their selecting this 

 position. At times they would be well sheltered from the wind, but 

 this was not always the case ; indeed, more often than not, far better 

 cover would have been afforded by the herbage. The explanation 

 therefore appeared to be that the sun heat was a matter of vital 

 importance to them, and the position in which the freshly emerged 

 examples had been found appeared to suggest that the pupa also 

 was not averse to a sunny corner. I therefore determined to repeat 

 my former trials, and to let the insect have plenty of sunshine 

 throughout its stages. The question of food, I confess, I could 

 throw but little light upon. Tormentilla is certainly very common 

 on the banks, but so are numbers of other small plants, the only 

 species that exceeds in abundance all the others being the tamarisk. 



On September 5th, 6th, and 8th, 1900, I took moths which 

 deposited ova, the last being laid on the 15th. At first the eggs 

 were pale green, but soon changed to a dull pink, and commenced 

 to hatch on the 17th. The young larvae were put in wide-mouthed 

 bottles of about two-ounce capacity, with a piece of thin calico 

 secured with an india-rubber band for a cover, and given knotgrass 

 {Polygonum aviculare) for food. They were kept where they got a 

 good deal of sunshine, and as they grew, larger bottles were 

 substituted. 



By the beginning of November knotgrass failed, and the larvs, 

 showing signs of hybernating, were moved into glass jars of some 

 thirty-ounce capacity, about an inch of dry silver sand being put 

 into the bottom to absorb any undue moisture, and a liberal supply 

 of very fine, dry grass stems added, on which the larvae soon settled 

 themselves. For food, small portions of a crepis {Crepis virefis, I 

 believe) and chickweed {Steilaria media) were given at frequent 

 intervals, but I could discover no signs of it having been eaten. As 

 it dried, however, it formed good cover for the larvai in case of 

 severe weather. 



Throughout the winter the jars were kept in such a position that 

 ihe larvae would get the benefit of any little sunshine there might be, 



