250 ME. C. J. WITH ON SOUTII-AMEEICAN CHELIFEEIN"^ 



III. Group of Chelifer oimicoides F. 

 Femur of the first pair of legs loith wide oblique articular cavity , with posterior condylus 

 placed near ventral margin. Fingers of the palps with accessory teeth. Indistinct 

 eyes or ocular spots. Tarsal '■'•tactile'" hair at least 3- removed from hase. 

 This group, as is easily realised when the above meagre diagnosis is compared with 

 those of the preceding groups, is not so well defined as the three others, and I am not 

 quite sure that all the species referred to it really go naturally together ; but, as 

 several species could not be examined, and as I had no opportunity of examining and 

 comparing the male genital organs, I have accepted the above definition, as at 

 least one structure, viz. that of the accessory teeth on the fingers of the palps, is 

 characteristic of all the members of this group. The genital apparatus of the male 

 viewed from the outside shows a marked diff'erence when, for instance, Ch. hicolor Balz. and 

 Ch. argentinus Thor. are compared ; but only a closer investigation will show whether 

 these organs are fundamentally different. I have subdivided this group into four sub- 

 groups, namely, the Ch. rudis Balz. s.-g., Ch. subrohustus Balz. s.-g., Ch. hicolor Balz. 

 s.-g., and Ch. argentinus Thor. s.-g. The last-mentioned of these four divisions is 

 quite a natural one and easily distinguished by a number of characters, and the first 

 and the second are fairly well characterised, but the third is of a rather heterogeneous 

 nature. For practical reasons I have included all the species referred to the first 

 three subgroups in a single analytical key. The Ch. cimicoides F. group includes 

 {cf 20. pp. 133-134) most species recorded in the literature as Chernes Menge or 

 Trachychernes Tom., and a good many of those described as Lamprochernes Tom. or 

 Atemmis Can. from South America at least. 



/Synopsis of Species *. 



a. Hand witli strong protuberances 18. Ch. armiger Balz. 



b. Hand without protuberauces. 



a\ Fingers of palps 1"5 as long as hand; palps with partly very 



long, clavate hairs 19. Ch. echinatus Ell. 



6\ Fingers about as long as or shorter than hand. 



«". About 30 short, distinctly clavate hairs along the hindmost 

 margin of the tergites in addition to 8-10 in front of row. 

 Femur, which is about 1"9 as long as wide, is widened out 

 beyond the stalk anteriorly as well as posteriorly ... 13. Ch. rudis Balz. 



* Alb. TuUgren has recently described three species, which probably ought to be referred to the subgroup 

 of Oh. hicolor Balz., viz. 07i. compressus Tullgr. (23. 1907, pp. 42-43, figs. 8 a-b), from Haiti, with a chela 

 which is depressed from above downwards and appears triangular in dorsal view ; Gh. hoclci TuUgr. (23. 

 pp. 44-46, figs. 9 a-h), from Bolivia, which, by its fairly long aud slender palps with a long tibial stalk, shows 

 a similarity to Ch. venezuelaniis Balz. ; and Gh. oliausi Tullgr. (23. pp. 72-73), from Ecuador. To the subgroup 

 of Ch. hicolor Balz,. probably belongs Ch. moreiisis TuUgr. (24. 1908, pp. 60-63, figs. 4-6), from Argentine, 

 and Ch. nordenskjoldi Tullgr. (24. 1908, pp. 63-64, figs. 7-8), from Patagonia, both perhaps nearly related to' 

 Ch. jpatagonicus Tullgr. 



