542 Appendix. 



raised on each side into a foliaceous border carrying five 

 spines of different lengths, the foremost pair, directed 

 towards the head, being the longest. The pupa is brown, 

 and ornamented with four pairs of brilliant metallic 

 spots, one pair close behind the antennae, and three 

 pairs, almost coalescent, on the back before the longest 

 pair of spines. A short spine projects from the 

 middle of each of the latter somewhat arched metallic 

 patches. 



" In the pupa of Colcenis Dido (which resembles that 

 of Colcenis Julia, and to which may be added those of 

 Dione Vanilla and Juno} the spines are absent, the wing 

 region is but moderately arched, and the antennas 

 marked only by small elevations; instead of the leaf-like 

 border, there are on each side of the back five knotty 

 or humped processes. The metallic spots are similar in 

 number and position to those of Heliconius Eucrate \ 

 those on the back have a wart-like process in the 

 middle, instead of a spine. 



" The pupae of Heliconius and Colcenis when moving 

 their posterior segments rapidly, as they do whenever 

 they are disturbed, produce a very perceptible hissing 

 noise by the friction of these segments, this sound, which 

 is especially noticeable in the case of Heliconius Eiicratf, 

 perhaps serving to terrify small foes. . (So loud is the 

 sound produced in this manner by the pupae of Epicalia 

 Nuinilia, that my children have named them ' Schrei- 

 puppen!'} 



" The pupse of Heliconius and Colcenis thus differ to a 

 much greater extent than the imagines or larvae, and 

 the same holds good for Eueides in a much higher 

 degree as compared with its above-mentioned allies. 

 The larvae of Eueides have no distinctive characters, and 

 even the generic rank of the imagines is doubtful ; as 

 pupae, on the other hand, they are far removed (even by 

 their mode of suspension) not only from the remainder 



