12 PLATE CXLIX. 



far beyond the thorax by it's long (lender neck. It has alfo a verf 

 bufy motion of it's head from the right to the left when it runs: we 

 obferve a limilar motion in many Infefls^ but as few have fuch a 

 llender neck, it is feldom fo quick and repeated as in this. 



The natural fize is given in the upper part of the plate, the mag- 

 ni'fied appearance of the head is fhewn below* 



PLATE 



