1 44 Appendix. 



of the Coalburgh broods with those of the same species 

 in the Catskills : 



EXP. 5. On arriving at the Catskills, on June iSth, 

 a few male Marcia, var. D, were seen flying, but no 

 females. This was exactly one month later than the 

 first males had been seen at Coalburgh. The first fe- 

 male was taken on June 26th, another on June 2/th, and 

 a third on the 28th, all Marcia, var. C. Thus the first 

 female was thirty-eight days later than the first at Coal- 

 burgh. No more females were seen, and no T/taros. 

 The three specimens captured were placed on Aster, 

 where two immediately deposited eggs 4 which were for- 

 warded to Coalburgh, where they hatched on July 3rd. 

 The first chrysalis was formed on the 2Oth, its butterfly 

 emerging on the 29th, so. that the periods were: egg 

 six, larva seventeen, pupa nine days. Five per cent, of 

 the larvae became lethargic after the second moult. 

 This was, therefore, the second generation of the butter- 

 fly from the first laying of eggs. All the butterflies 

 which emerged were Tharos, the dark portions of the 

 wings being intensely black as compared with the Coal- 

 burgh examples, and other differences of colour existed, 

 but the general peculiarities of the Tharos form were 

 retained. This second generation was just one month 

 behind the second at Coalburgh, and since, in 1875, 

 eggs were obtained by Mr. Mead on July 2/th and 

 following days, the larvae from which all hibernated, 

 this would be the second laying of eggs, and the 

 resulting butterflies the first generation of the follow- 

 ing season. 



Thus in the Catskills the species is digoneutic, the 

 first generation being Marcia (the winter form), and the 

 second the summer form. A certain proportion of the 



4 Mr. Edwards has shown also that Argynnis Myrina can 

 lay fertile eggs when but a few hours out of the chrysalis. 

 Canad. Ent, September, 1876, vol. viii. No. 9. 



