more diftinguimed by the Angularity than the beauty of 

 their appearance. The very curious exotic fpecies here 

 figured, both in its natural fize and magnified by the 

 microfcope, is an exception to this general rule, and is 

 adorned with marks of no inconfiderable fplendor; the 

 upper part of the body being furnifhed with three and 

 fometimes more large fpots of a golden tinge, accom- 

 panied by a metallic luftre. This appearance is how- 

 ever moft confpicuous while the animal is immerfed in 

 fpirits of wine. The general colour of this fpecies is a 

 pale greenilh-brown, variegated with minute fpecks of 

 black, forming fo many imprefTed fpots on the furface 

 of the body. The edge of the abdomen is very flightly 

 notched or indented by a row of marks of the fame 

 colour. In the general form of the apparatus at the 

 head, this fpecies bears a mod ftriking affinity to the 

 pigeon-tick or Acarus columbarum, being furnifhed 

 like that animal, with a ferrated fnout, the procefTes of 

 which lying on the under furface, and pointing back- 

 wards, enable it to adhere with great firmnefs to the 

 Ikin of the creature it infefts. The fpecies to which it 

 bears the greater! refemblance is the AcarusTguanse of 

 Fabricius, which is by that author commemorated as 

 having been found ftrongly affixed to the gular pouch 

 of the Lacerta Iguana of Linnseus preferved in fpirits. 

 The prefent fpecies is found adhering in the fame man- 

 ner to fpecimens preferved in fpirits of the Coluber 

 Naja or Cobra de Capelio. It is moft probably a new 

 fpecies, unlefs it Ihould be regarded as a variety of the 

 A. Iguana? of Fabricius. The circumftance of fnakes 

 being fometimes infefted by Acari is mentioned by 

 Seba, who, in the ufual inaccurate ftyle of his time 3 

 gives them the title of Pediculi. 



