. The butterflies of the British Isles. Butterflies. THE BUTTERFLY. 7 chrysalids are furnished with hooks on the tail as well as with a girdle for suspension ; but others have hooks only. As almost all the chrysalids here considered are figured in the illustrations, it will be unnecessary to refer in detail to their great diversity in form, but a few general remarks on the structure of a chrysalis may be made. If the upper {dorsal) surface of a chrysalis is examined, the thorax and the body divisions will easily be made out, while, by looking at the sides and the under {ventral) surface, the v
. The butterflies of the British Isles. Butterflies. THE BUTTERFLY. 7 chrysalids are furnished with hooks on the tail as well as with a girdle for suspension ; but others have hooks only. As almost all the chrysalids here considered are figured in the illustrations, it will be unnecessary to refer in detail to their great diversity in form, but a few general remarks on the structure of a chrysalis may be made. If the upper {dorsal) surface of a chrysalis is examined, the thorax and the body divisions will easily be made out, while, by looking at the sides and the under {ventral) surface, the various organs, such as the wings, legs, antennae, etc., will be found neatly laid along each side of the " tongue," or proboscis, which latter extends down the centre. All these are separately encased, but Fig. 5. by reason of the shell mentioned in the Enlarged view of cre- remarks on the caterpillar, they appear master, and a hook to be welded together. When, how- ^AfterS^rf^' ever, the butterfly is ready to emerge, the shell of the chrysalis is split along the thorax and at the lower edge of the wing-cases, and the insect is then able to release itself from the pupal trappings. This breaking open of the chrysalis shell is termed dehiscence {dehisco, " to split open "), and the manner in which it is effected varies in different species. The emergence of a butterfly from the chrysalis is always an interesting operation to observe, and every one should make a point of watching the process, so that he may obtain practical knowledge of how the thing is done. A photo- graph of it will be found in the description of the Wall Butterfly. The Butterfly. Having safely cleared itself free of the chrysalis shell, the butterfly makes its way to some suitable twig, spray, or other object, from which it can hang, sometimes in an inverted position,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability -
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Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectbutterf, bookyear1906
