88 



Guide to AracJniida. 



Table-case superlicial resemblance to scorpions, the Urotricha are known as 



No. 21. Whip-scorpions. All the known genera (which number ten) are 



referred to tlie family Thclyplwnidac, which is now restricted 



Fig. 57. 

 Whip-scorpion (TlielypJwnus caiidatus), x 2. 



to Soutli-Eastern Asia and Tropical America. Of tlie genera, 

 ThchfpJionus, which is widely distributed in the Oriental region, 

 is the richest in species. The largest known species of The- 

 lyphonid {Mastigopwctns gigautcus), a species which is found 

 in the southern part of North America, sometimes reaches a 

 length of more than two and a half inches. In the Carboniferous 

 period the family was represented by the genus (icraUiiiird, 

 which has l)een discovered l)oth in Europe and in North 

 America. 



Whip-scorpions live beneath stones or fallen tree-trunks, or in 

 burrows in the soil. Thev feed mostlv on insects, wdiich they 



