42 



Tarsus IV. The tarsus of the fourth pair of legs are two-jointed in all the 

 forms, but those belonging to the Cheliferidae Hans., which have this tarsus one- 

 joinled; as a general rule Ihe larsi of the fourth pair of legs are shorter than those 

 of the first pair, at least when compared to their own tibia. While the tarsus of 

 the tirsl pair of legs is always longer than the tibia in the Hemiclenodachjli, it is 

 not so with the tarsus of the fourth pair; the tarsus and the tibia are f. inst. of 

 equal length in Ideobisiiim Bnlzanii With (21. pi. X, fig. 2 g) and the former joint 

 of Blothvus spelaeus Sch. even shorter than the latter. The relation between the 

 length of the two tarsi seems to be the same as in the first pair of legs. The 

 tarsus of the fourth pair of legs is in most forms of the Garypidae Hans., in which 

 the larsus of the first pair of legs is distinctly longer than the tibia, of equal length 

 to or a little longer than the tibia e. g. Garypiis irrngatiis Sim. (1^1. II, fig. 1 d) and 

 Olpiiim Birmanicum n. sp. (PI. II, fig. 7h); if the tarsus of the first pair is only a 

 little 'longer or of equal length to the tibia, we will most often find the tibia of 

 the fourth pair of legs longer and even much longer than the tarsus f. inst. in 

 Garypinus nohilis n.sp. (PI. I, fig. 8 g). This disproportion is especially well marked 

 in Garypiis Floridensis Bks., in which we have the tarsus of the first pair 13 longer 

 than the tibia, while the latter joint of the fourlh pair of legs is M longer than 

 the tarsus (fig. 9 b, p. 41). The tarsus of the fourth pair of legs is in Chelifer Geof. 

 always shorter and sometimes much shorter than the corresponding tibia f. inst. 

 in Ch. eqiiester With, in which the tibia is la longer (cf. PI. IV, fig. 10 d); the 

 tarsus of Chiridiiim Menge is shorter than the tibia of the fourth pair of legs, but 

 a trifle longer in Pseudochiridium n. g. (PI. IV, figs. 12 f and 14 b). 



Hansen was the first author, who pointed out, that sj'stematic characters are 

 found in Ihe relation between the length of the tibia and the tarsus, and he pro- 

 posed to use this character in the definition of his families, "if tibia always is 

 longer than the tarsus in the Cheliferidae, shorter than the tarsus in the Garypidae" 

 (49. p. 233); this character will as seen from the above scarcely be of value in the 

 identification of these two families, but it will certainly be valuable at least in the 

 characteristics of species and even genera. 



Shape of tarsus. It is not only the proportions of the tarsus, which pro- 

 vides systematic interest, but also its shape at least in the males of those species 

 of the Cheliferinae Sim., in which a pronounced sexual diflerence is found in the 

 shape of the tarsus of the first pair of legs. In Chelifer Socrotensis With f. insl. it 

 is tapering from the base towards the tip and about 4'5 times longer than deep at 

 the base (21. pi. VII, fig. 4 h) in the female, while the tarsus of the male attains 

 its greatest depth just in front of the base, is as deep terminally as it is basally 

 and only about 35 longer than deep (21. pi. Ill, fig. 4 g). The tarsus of the female 

 of Ch. lampropsalis h. K. is as in the female of the species just mentioned, but five 

 times longer than deep, while that of the male is 3(5 longer than deep, deepest 

 just behind the middle and terminally provided with a dorsal, obliquely forwards 

 and upwards directed strong conical tooth (PI. Ill, fig. ii a). The larsus of Ihe first 



