Abstract
THE tracheoles supplying the epidermis in Rhodnius are simple or branched tubes, 200–350 µ in length, tapering gradually from a diameter of 0.7–0.8 µ to end blindly at about 0.2µ. Each is laid down within a single cell, the nucleus of which lies at about one-third of the way along the tube. Once laid down, the tracheoles persist unchanged throughout the life of the insect: they do not shed their cuticular linings at moulting, nor are they converted into tracheæ (cf. Keister1 on the late stages of Sciara).
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References
Keister, M. L., J. Morph., 83, 373 (1948).
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WIGGLESWORTH, V. Motility of Insect Tracheoles. Nature 172, 247 (1953). https://doi.org/10.1038/172247a0
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DOI: https://doi.org/10.1038/172247a0
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