Diseases & disorders of the Diseases & disorders of the horse : a treatise on equine medicine and surgery diseasesdisorder00gres Year: 1886 Sr the tumours called warbles. The fly is provided with an ovi-positor, Ij)- means of which it bores holes through the skin, in each of which it deposits one egg. The eggs develop into bots, which may be recognised b)' the growth of little elevations or tumours, called warbles. The tail end of the bot places itself in the tumour of the host, in order that it may be enabled to breathe. The bot, when completely developed, escapes and buries itself in the g
Diseases & disorders of the Diseases & disorders of the horse : a treatise on equine medicine and surgery diseasesdisorder00gres Year: 1886 Sr the tumours called warbles. The fly is provided with an ovi-positor, Ij)- means of which it bores holes through the skin, in each of which it deposits one egg. The eggs develop into bots, which may be recognised b)' the growth of little elevations or tumours, called warbles. The tail end of the bot places itself in the tumour of the host, in order that it may be enabled to breathe. The bot, when completely developed, escapes and buries itself in the ground, and then passes through the chrysalis stage, in which it remains about six weeks, at the end of which time it at length emerges as a perfect fly, which again deposits eggs, and so the cycle goes on again. The eggs of the bot-fly of the sheep are deposited in the nostrils, to the great distress of the poor animal. The larvae or bots pass upwards towards the sinuses or cavities of the forehead of the sheep, and thus cause greatdistress. ASCARIS LUMBRICOIDES. A, Female Ascaris Lumbricoides. B, Anterior extremity enlarged, seen from tlie side>. C, The same, seen from the front, showing the opening in the centre. E, The Posterior extremity enlarged. D, Male Ascaris, natural size. G
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