44 



may answer one or both of these purposes ; but with regard to the 

 red hairs, which I last described, I am totally at a loss to conjecture 

 a probable purpose they may be designed to serve, and I shall be 

 glad to hear any suggestions on the point. 



Both kinds of the shorter hairs are from the tenth to the eighth 

 of an inch in length. 



EXPLANATION OF PLATE X. 



Fig. 1 . Hair from the upper surface of the body of a Tarantula. 



Fig. 2. Hair from the under surface of the body of the same Tarantula. 



