61 



female may have migrated, or may have been carried by the winds to 

 this place. 



I do not know of any other plants of the genus Aristolochia in this 

 vicinity, except those which are cultivated in our botanic garden. In 

 the middle and southern States the Philenor inhabits Aristolochia 

 Serpentaria, 



The young larvae of the Philenor, before the first moulting, closely 

 resemble in form and in their tubercles, the figure of the larvae of Or- 

 nithoptera Helicaon, copied in Boisduval's 'Hist. Nat. des Lepidopt.' 

 from Dr. Horsfield's Catalogue. After the first moulting the first pair 

 of tubercles increase in length and become proportionably much longer 

 than the others, and the body itself more elongated ; Abbot's figure of 

 the full-grown larva in the ' Insects of Georgia,' tab. iii., may be con- 

 sidered quite correct, except that the last pair of dorsal tubercles 

 should have been curved backwards and outwards, and the yellowish 

 or rather orange-coloured spot on the first segment, should have been 

 placed between the first pair of horn-like tubercles immediately in 

 contact with the head, and not behind them. The pupa is not well 

 done in Abbot's work ; and both larva and pupa in Boisduval and 

 Leconte's ' Lepidoptera Americana' are miserably represented. The 

 pupa approaches more nearly in form to that of Ornithoptera Helicaon 

 than it does to that of any other butterfly known to me. 



I have preserved specimens in spirit. It appears to me that the 

 Philenor may be considered as one of the connecting species between 

 Ornithoptera and Papilio proper, while Podalirius, Asterias &c. should 

 come at the end of the genus, connecting it, perhaps, with Doritis, 

 Colias, &c. 



The larvae of Philenor live in company, and cover the surface on 

 which they are about to move with zigzag lines of silk, and seem unable 

 to crawl or hold on without this precaution, for when placed on a fresh 

 leaf the least motion causes them to fall off. This is not the case with 

 the larvae of Asterias, which is solitary, and does not carpet its path. 

 Those of Turnus and Troilus are also solitary, and they cover the 

 leaves on which they live with a complete coating of silk, and bind 

 up the sides of the leaf to form a kind of trough, in which they remain 

 when at rest. Hence the three groups of which these species are the 

 representatives, differ as much in habits as in the forms of the larvae. 



T. W. Harris. 



