142 Appendix. 



of the larvae had been lethargic. This was the third 

 generation from the second laying of eggs. 



EXP. 4. On August 1 5th, at Coalburgh, eggs were 

 obtained from a female Tharos, and then taken directly 

 to the Catskill Mountains, where they hatched on the 

 2Oth. This was the fourth generation from the third 

 laying of eggs. In Virginia, and during the journey, the 

 weather had been exceedingly warm, but on reaching the 

 mountains it was cool, and at night decidedly cold. Sep- 

 tember was wet and cold, and the larvae were protected 

 in a warm room at night and much of the time by day, 

 as they will not feed when the temperature is less than 

 about 8 R. The first pupa was formed September 

 1 5th, twenty-six days from the hatching of the larvae, 

 and others at different dates up to September 26th, or 

 thirty-seven days from the egg. Fifty-two larvae out of 

 127 became lethargic after the second moult on Sep- 

 tember i6th, and on September 26th fully one half of 

 these lethargic larvae commenced to feed again, and 

 moulted for the third time, after which they became 

 again lethargic and remained in this state. The pupae 

 from this batch were divided into three portions : 



A. This lot was brought back to Coalburgh on Octo- 

 ber 1 5th, the weather during the journey having been 

 cold with several frosty nights, so that for a period of 

 thirty days the pupae had at no time been exposed to 

 warmth. The butterflies began to emerge on the day 

 of arrival, and before the end of a week all that were 

 living had come forth, viz., 9 males and 10 females. "Of 

 these 9 males 4 were changed to Marcia var. C, 3 were 

 var. D, and 2 were not changed at all. Of the 10 fe- 

 males 7 were changed, 5 of them to var. B, 3 to var. C. 

 The other 2 females were not different from many 

 T/iaros of the summer brood, having large discal patches 

 on under side of hind wing, besides the markings com- 

 mon to the summer brood." 



