. Mites injurious to domestic animals (with an appendix on the acarine disease of hive bees). Mites; Veterinary medicine; Bees. 96 Mites Injurious to Domestic Animals. that tie metabolic products of the mite may perhaps cause toxaemia (see " Bee World," October, 1920—April, 1921, p. 59). White has pointed out that pathological changes take place in the tubes infested by them ; whilst the muscles concerned with flight also show degenerative changes. The tracheal tubes of bees are normally pale,. Acampis woodi.—Female from above, X 405. (After Hirst, Ann. Mag. Nat. Hist., June, 1921.)
. Mites injurious to domestic animals (with an appendix on the acarine disease of hive bees). Mites; Veterinary medicine; Bees. 96 Mites Injurious to Domestic Animals. that tie metabolic products of the mite may perhaps cause toxaemia (see " Bee World," October, 1920—April, 1921, p. 59). White has pointed out that pathological changes take place in the tubes infested by them ; whilst the muscles concerned with flight also show degenerative changes. The tracheal tubes of bees are normally pale,. Acampis woodi.—Female from above, X 405. (After Hirst, Ann. Mag. Nat. Hist., June, 1921.) but in advanced cases of the disease they become brownish or blackish, and this makes it easy to recognise the malady, for if the tracheae of a bee are discoloured the mite is invariably present. This change in the colour of the tracheal tubes is accompanied by hardness and brittleness of their walls. White has shown that if one of the thoracic stigmatal openings of a bee is closed with wax, the insect loses. 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 Hirst, Stanley, d. 1930. London, Printed by order of the Trustees
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Keywords: ., bo, bookcentury1900, bookdecade1920, booksubjectbees, bookyear1922
