58 



Alexander Petrtinkevitch . 



of great importance. In the sub-order Uropygi or whip scor- 

 pions the coxae of the pedipalpi are so large that they cover 



completely the chelicera. Mo- 

 vably jointed to the anterior 

 part of the sternum they meet 

 in the middle line. Immediately 

 behind them are the coxae of 

 the second pair of legs, while 

 the considerably smaller first 

 coxae, widely separated from 

 each other, are situated in front 

 of the anterior distal corner of 

 the second at the sides of the 

 palpal coxae. In the sub-order 

 Amblypygi the coxae of the 

 pedipalpi do not meet in the 

 middle line, being separated from 

 each other by the anterior part 

 of the sternum, while the weak 

 first coxae are so situated that 

 their sides are in contact with 

 the distal part of both the palpal 

 and second coxae. No other 

 arachnids have anything similar 

 to the arrangement of the coxae 

 in both sub-orders of Pedipalpi. 



Figure iS.— Tarantula fusciniana, 

 from Central America, a representa- 

 tive of the suborder Amblypygi. 



LIST OF DESCRIBED SPECIES OF PEDIPALPI 



Sub-Order Uropygi. 



Cephalothorax longer than wide. Abdomen with a segmented 

 whip or a short style. Coxae of pedipalpi meeting in the middle line. 



Family Thelyphonidae Lucas. ^ 

 Cephalothorax entire. Abdomen with a segmented whip. 



^ Family Geralinuridae Scudder is a synonym of Theliphonidae. Its 

 definition was based on specimens incorrectly described. Moreover it 

 includes the genus Graeophonus which belongs to the sub-order Amblypygi. 



