. An introduction to zoology, with directions for practical work (invertebrates). FiQ. 249.—The Blow-fly {Calliphora vomitoria). ( x 2.) corner available, contracts its body to a regular, oval shape, and then, without casting its larval skin, enters the resting stage. The skin hardens and turns brown, and the body within undergoes the same curious dissolution as in the House-fly. In four or five days, however, the white pupa is to be found within, Un^rh of larva B^^_^._ and in time this breaks one end of the enclosing co- coon by beating on it with its head; then, pushing ofT the end as a
. An introduction to zoology, with directions for practical work (invertebrates). FiQ. 249.—The Blow-fly {Calliphora vomitoria). ( x 2.) corner available, contracts its body to a regular, oval shape, and then, without casting its larval skin, enters the resting stage. The skin hardens and turns brown, and the body within undergoes the same curious dissolution as in the House-fly. In four or five days, however, the white pupa is to be found within, Un^rh of larva B^^_^._ and in time this breaks one end of the enclosing co- coon by beating on it with its head; then, pushing ofT the end as a little cap, the fly em erges; soon its wings ex-. FiG. 250.—Stages in the Life of the Blue-bottle. A, Eggs ; M, larva or maggot; C, pupa. pand, its colour darkens, and it flies off to find a mate. The Tsetse-fly {Glossina marsitans), which is The Tsetse- ^^^^^ ,^ serious plague in Central and East Africa, is closely allied to the Blow-fly. It pierces the skin and sucks the blood of cattle, and in so doing intro- duces into the blood of the healthy animal, the germs of a disease known as " nagana " or " ; Where these flies abound, this disease may exterminate whole herds of Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lulham, Rosalie Blanche Jermaine. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
