218 ME. C. J. WITH ON SOUTH-AMEEICAN CHELIPEEINiE 



Some of the species established may possibly be identical with forms described by 

 Banks from North America ; but if this proves to be the case I may be excused by 

 the fact that the descriptions of that author, at least so far as the False-Scorpions are 

 concerned, are generally too imperfect for even approximate identification. 



The South-American and perhaps all Cheliferince are divided into at least four 

 groups ; the reasons vphy I have not given these groups the rank of genera are, 

 that one of them may be subdivided, that some interesting species were not at 

 my disposal, and that a comparative investigation of the male organs ought to be 

 undertaken before definitely settling the case. 



Key to the Groups q/" Cheliferinse {Simon), 

 a. Fingers of the palps without accessory teeth. Galea better developed in 

 females than in males. 

 a}. Femora of the first pair of legs with slightly developed articulatiou 

 between the two portions, with the posterior condylus placed higher 

 than the anterior ; flagellum consisting of four hairs ; c? with 

 sternal spines ; distinct transverse grooves ; obtuse or clavate hairs ; 

 generally real eyes ; " tactile " hair of tarsus IV. well removed from 

 base ; claws and subterminal hair simple . . II. Group of Chelifer subniher Sim. 

 6'. Femora of the first pair of legs with well-developed articulation and 

 with posterior condylus placed lower than anterior ; cJ never with 

 sternal spines. 

 a'. Real eyes ; obtuse or clavate hairs ; " tactile " hair of tarsus IV. far 

 removed from the base ; distinct transverse grooves ; genital area 

 oi'iS with long ram's-horn-shaped organs; coxse IV. ( cJ ) with coxal 

 sac, and its tergites often with lateral keels ; claws and subterminal 



hair generally with teeth I. Group of Ch. cancroides L. 



6^ No real eyes; pointed almost simple hairs; "tactile" hair 

 of tarsus IV. basal ; transverse grooves generally indistinct or 

 wanting ; genital area of (J without ram's-horn-shaped organs ; 

 coxse IV. without coxal sac and tergites without lateral keels ; 

 claws as well as subterminal hair always simple. 



IV. Group of Ch. hirmaniciis Thor. 

 b. Fingers of the palps with accessory teeth. Femora of the first pair of 

 legs with well-developed articulation between the two portions and 

 with posterior condylus placed lower than anterior. 



III. Group of Gh. cindcoides F. 

 a'. " Tactile " hair of tarsus IV. more than ^ removed from base ; tibia IV. 

 without dorsal median " tactile " hair ; tibia of the palps without 

 posterior " tactile " hairs in middle ; galea larger in ? than 



in (J. 

 a'. Four hairs in flagellum; real eyes; abdominal tergites with 30 

 short clavate hairs along hindmost margin and 8 in front. 



Ill a. Subgroup of CA. ?Wm Balz. 



