350 BLIGHT. 



these insects, and we observe them endeavouring to 

 secrete themselves in the crannies of any neighbour- 

 ing substance. Should the savoy cabbage be near 

 the trees whence they have been dislodged, the cavi- 

 ties of the under sides of its leaves are commonly 

 favourite asylums for them. Multitudes perish by 

 these rough removals, but numbers yet remain ; and 

 we may find them in the nodes and crevices, on the 

 under sides of the branches, at any period of the 

 year, the long, cottony vesture being removed, but 

 still they are enveloped in a fine, short, downy 

 clothing to be seen by a magnifier, proceeding ap- 

 parently from every suture, or pore of their bodies, 

 and protecting them in their dormant state from 

 the moisture and frosts of our climate. This aphis, 

 in a natural state, usually awakens and commences 

 its labours very early in the month of March ; and 

 the hoariness on its body may be observed increas- 

 ing daily : but if an infected branch be cut in the 

 winter, and kept in water in a warm room, these 

 aphides will awaken speedily, spin their cottony 

 vests, and feed, and discharge, as accustomed to do 

 in a genial season. 



It is often very difficult to ascertain the first 

 appearance of many creatures not natives of our 

 climate, though, from the progress of science, and 

 more general observation, many things will be re- 

 corded. The first visit of the death's-head moth 



