which are found in our own country being much fmaller 

 than the reprefentations given by Swammerdam, Roefel, 

 and Seba. The microfcopical figure in the annexed 

 plate is executed with the greater! accuracy. The fepa- 

 rate figure reprefents the head and thorax very much 

 magnified, in order to fhew the pectinated parts, which 

 though differing in fituation, arc nearly of the fame 

 form as in fcorpions. Fig. i. (hews the natural fize of 

 the Englifh fpecimens. Linnaeus accufes it (I believe 

 moft unjuftly,) of fometimes getting under the fkin, 

 and raifing a painful tumour. It is generally found on 

 old walls, and fometimes amongft papers, &c, and is 

 »ot a very common infect. 



