﻿SOME NOTES ON THE PAPlLIONlDS. 



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iu 1911. The rarity of its food-plants, Lindera henzoni ^n(\. 

 Sassafras officinale, should prevent it from ever establishing itself 

 in this country, though it other respects it may not be unsuited. 

 A peculiarity v/hich I have noticed in this butterfly is that the 

 imagines do not oviposit, or even as far as I have been able to 

 observe, pair, for at least a week after emergence. 



(4) Jasoniades filaucus.— This butterfly, the common tiger 

 swallow-tail of the Eastern United States, in spite of its being a 

 northern butterfly which has spread southwards rather than the 

 reverse, shows far less climatic adaptability than Laertias 

 2)hilenor. Unlike that species and Euphocades troilus, it shows 

 with me a noted tendency to remain double-brooded, and 

 individuals which I have collected as full-fed larvae and allowed 

 to pupate in the cool temperature of a fruit-house, have still 

 completed their transformations in the same season, emerging 

 as imagines until late in October. This species does not ovi- 

 posite freely in my butterfly-house, though I have found the 

 larva3 out-of-doors on Ptelea trifoliata (American hop-tree). In 

 the text-books it is said to feed on various Kosaceae, &c., and 

 indeed for a Papilionid larva, to be polyphagous. But though 

 at the time I first bred it, plum, cherry, and birch, said to be 

 amongst it food-plants, were grown in my butterfly-house, it 

 always chose to lay its eggs on Ptelea (natural order Kutaceae). 

 I have found the young larvae even on Aristolochia sipho. I may 

 mention that on several occasions I have seen jnachaon/pmsue 

 and attempt to pair with glaucus in my butterfly-house, and 

 once I found a pair in copula. The ova were infertile as might 

 be expected in the case of species so widely different. I may 

 add that on this and the other occasions I mention, it was 

 always the normal yellow female glaucus by which machaon was 

 attracted, never the black variety. I have also seen machaon 

 attracted by the female Heraclides cresphontes, and Laertias 

 philenor (male) pursue the (female) Euphocades troilus. In all 

 these cases the colours, and, to some extent, the general mark- 

 ings of the two species are similar. The habits of the larva of 

 this species bear some resemblance to those of Euphocades troilus, 

 in so far as it rests on a silken carpet which it spins over the 

 middle of the upper side of a leaf. In its case, however, the 

 edges of the leaf are only partially bent over, probably to 

 prevent the larva from being washed away during heavy rains, 

 not made to close completely over its back as in that of E. troilus. 

 After the winter the pupa3 of the spring brood of glaucus'havela, 

 tendency to die unless supplied with an abundance of water, 

 which would kill most other species. 



(To be continued.) 



