(147). _Inflammation caused by Maggots._ The insects passing under the name of "Fly," though most troublesome in August, attack the sheep from the month of May to September, inclusive, depositing their eggs among the wool, in general about the tail, the roots of the horns, or any part which affords, from its filthy appearance, a prospect of suitable provision for the maggot. When these eggs are hatched, a process which is, in sultry weather, almost instantaneous, the maggot erodes the skin, and speedily brings the adjacent parts into a fit condition for the reception of succeeding numbers of its species. The backs of long-woolled sheep are, from their exposure, more liable to be selected by the flies, as a receptacle for their eggs, than the corresponding parts in such as are covered by a short thick fleece. No sooner has the maggot begun its operations, than the sheep becomes uneasy and restless, rubbing itself on stones and trees, and endeavouring, by every means in its power to free itself from the annoyance. Teazed by the constant irritation, fever soon sets in, and, if the sheep be unrelieved by the shepherd's aid, death ensues in four-and-twenty hours. It is only lately that attention has been paid to the history of the insect pests which originate the mischief, so little damage do they appear to have occasioned in former periods. In a valuable paper, containing the result of observations made on this subject in the Highlands, and published in the second number of the _Quarterly Journal of Agriculture_, they are thus described:-- "The fly which is the immediate cause of this disease, seems, as far as my observations could extend, to consist of four species, viz.--the _Musca Ceasar_, _Cadaverina_, _Vomitoria_, and _Carnaria_, of Linnæus. * * * "_M. Ceasar_ is of a shining green colour. "_M. Cadaverina_, the thorax shining bluish, the abdomen green, like the _Ceasar_. "_M. Vomitoria_, thorax black, or dark-blue grey, abdomen dark glossy blue. This is the common _Blue-Bottle_ or _Flesh-fly_. "_M. Carnaria_, grey; the thorax has three black longitudinal markings on the upper surface; the abdomen is checquered, in some positions shining whitish.