<S)n the $hiti0h 



of 



0r 



By the Rev. O. PICKARD-CAMBRIDGB, M.A., F.R.S., 

 C.M.Z.S., &c., &c. 



(PLATES A, B, C, D, E.) 



(INTRODUCTION). 



HE popular idea of this curious group of the 

 Arachnida is that they are spiders. With the 

 Spiders (Araneidea), however, they have only an 

 Ordinal affinity, that is (in general terms and 

 omitting details and exceptions) the Harvest Men 

 (or Phalangidea) have, in common with spiders, 

 eight legs (each of seven main joints), articulated to the inferior side 

 of the fore part of the body, which is composed of the caput and 

 thorax, or ceplialotliorax ; and on the upper side of this, more or 

 less in front, the eyes, two in number, and always simple, are 

 placed. They have also, like spiders, in front of the legs, two 

 leg-like palpi, of six joints, as well as two f dices, each consisting of 

 two joints, ending with a moveable claw, which, opposed to a fixed 

 claw of the falx, forms a pair of pinchers, and, in reality, repre- 

 sents a third joint. 



When, however, we come to observe the differences between 

 Harvest-Men and true Spiders, these are very great and for 



