WHIP-SCORPIONS. 



123 



From the last joint arises a long, jointed, caudal appendage, much like a whip-lash 

 in appearance. The species are found ^ 



in both hemispheres, but in the eastern 

 hemisphere it is said by Stoliczka that 

 none are found west of India and Cey- 

 lon, not even in East Africa. But one 

 form, T. giganteus^ has been found in 

 the United States. 



The species of both of these genera 

 are very difficult to identify, and much 

 difference of opinion exists concerning 

 them. Like many of the arachnids 

 they are furnished with a jjoison ap- 

 paratus which here, as in the true 

 spidei-s, is placed in the chelicerre. 

 Of the development of the Pedipalpi 

 nothing is known. 



Fig. 178. — Phrynus lunaius. 



Sub-Order III. — Solifug^. 



These forms are readily sejiarated from all other arachnids by the segmented 

 ccphalothorax. The body is long; the chelioerse are chelate, and the palpi resembles 



Fig. 179. — Thelyphonus caiidatus, "wliip-scorpion. 



the true legs. Specimens are far from common in the United States, but thanks to 

 the late J. Duncan Putnam our native forms are very well known. 



There are fifteen genera, two of which {Datames and Cleohis) are represented in 

 the United States by nine species. These forms, which are found in tlie warmer parts 



