“The pupæ of _Heliconius_ and _Colænis_ 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 Eucrate_, perhaps serving to terrify small foes. (So loud is the sound produced in this manner by the pupæ of _Epicalia Numilia_, that my children have named them ‘_Schreipuppen_.’) “The pupæ of _Heliconius_ and _Colænis_ thus differ to a much greater extent than the imagines or larvæ, and the same holds good for _Eueides_ in a much higher degree as compared with its above-mentioned allies. The larvæ of _Eueides_ have no distinctive characters, and even the generic rank of the imagines is doubtful; as pupæ, on the other hand, they are far removed (even by their mode of suspension) not only from the remainder of the Maracujá group and from the whole of the great Nymphalideous group (_Danainæ_, _Satyrinæ_, _Elymniinæ_, _Brassolinæ_, _Morphinæ_, _Acræinæ_ and _Nymphalinæ_), but from almost all other butterflies. The larva pupates on the underside of a leaf; the pupa is fastened by the tail, but does not hang down like the pupæ of the other _Nymphalidæ_,--its last segments are so curved that the breast of the chrysalis is in contact with the underside of the leaf. I am not acquainted with any other pupa among those not suspended by a girdle which assumes such a position. Something similar occurs, however, in the pupa of _Stalachtis_, which is without a girdle, and according to Bates, is ‘kept in an inclined position by the fastening of the tail.’ By this peculiarity Bates distinguishes the _Stalachtinæ_ from the _Libytheæ_ with pupæ ‘freely suspended by the tail.’ “Besides through this peculiar position of the body, the pupa of _Eueides Isabella_ is distinguished by short hooked and long narrow sabre-like pairs of processes on the back and head. Its colour is whitish, yellowish, or sordid yellowish-grey; in the last variety both the four long dorsal processes and the surrounding portions, as well as the points of the other processes, remain white or yellowish. The pupa _Eueides Aliphera_ is very similar, only all the processes are somewhat shorter, the four longest (dorsal) and some other markings being black.