62 PLATE CXXXI. 



In the months of June and July, or earlier in forward feafons, 

 this Infe<a is found in great plenty in the lanes and fkirts of woods; 

 and are very troublefome to perfons or animals who pafs through fuch 

 places in the rniddle of the day r they conceal themfelves in the 

 crevices of the bark of trees, or among the foliage till about an hour 

 before noon, when they come forth in great plenty, and fettle on 

 the hands and face, or other thinly covered parts, and dart their fharp 

 pointed trunks or probofcis into the flefh : we have obferved the fling 

 of this Infect to be raoft fevere about mid-day, particularly when 

 the fun fhines bright, and emits much heat ; a difagreeable fenfation 

 continues in the flung part for fome time, and is generally fucceeded 

 by a large tumor, and a flight difcharge of pungent fluid before it 

 difappears entirely. 



To explain more minutely the ftructure of the trunk, we have 

 given a figure of its magnified appearance at Fig. Ill : the outer 

 coat, or fheath, terminates at its extremity, in two lateral, moveable 

 lips, and contains a longitudinal, horny, convex blade ; the acute 

 point of which is concealed between thefe lips : this interior tube, 

 when examined with a Microfcope, appears to confifl of three others, 

 exceedingly fharp at the points ; and are ufed by the Infect as lancets, 

 to lacerate the flefh when it feeds, while it pumps, or fucks up the 

 blood and moifture from the wound, through the capillary tubes with 

 which feveral parts of the trunk are furnifhed. 



It feeds in the fame manner on Infects, but chiefly on thofe in 

 the larva ftate. 



The fpecies is not uncommon in Germany, France, Italy, and 

 moft warm parts of Europe : alfo received from Georgia, in North 

 America. 



Fig. I. Natural Size. Fig. II. Front View of the Head mag- 

 nified, with the Eyes and Probofcis ; the former are moft beautiful, 

 microfcopical objects when the Infeft is alive, but turn brown after 

 it dies. 



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