45 



this hair is designated the tarsal "tactile" hair. This liair has been mentioned by 

 Thorell in his description of the different species of Chelifer Geof. and was observed 

 to stand sometimes nearer to the base and sometimes to the middle (1889. 10. 

 p. 596 and p. 606). This hair is rather variable in length, being sometimes as long 

 as or longer than the tarsus or the tarsi, and sometimes shorter (PI. I, lig. 1 ni, 

 pi. Ill, fig. 7 g). It is in the Hemictenodactgli as well as in those Garypidae Hans., 

 in which it occurs, placed near to the base of the basal tarsal joint (PI. I, figs. 1 m 

 and 4 i); it has in some species of Chelifer Geof. f. inst. in Ch. Indicus n. sp. a 

 similar position anteriorly at the base of the tarsus of the fourth (and third) pair, 

 but in most species it is placed near to the middle f. inst. in Ch. subruber Sim. 

 and Ch. Mortensenii n. sj)., and in a few near to the tip as in Ch. granulatus C. K. 

 This hair seems to be wanting in a few species f. inst. Ch. cimicoides F. and Ch. 

 Hawaiiensis Sim. (cf. below). 



Lateral terminal hair. Schiödte has in his classical description o( Blothrus 

 spelaeus Sch. mentioned and given a drawing of a long, slender and unilaterally 

 pinnate hair, placed on each side of the claws (1851. 31. tab. I, fig. 2f). This hair 

 seems to be characteristic of the members of the family of the Obisiidae Hans, as 

 well as of most species of the Cheliferinae Sim., for it seems to be wanting in all 

 the other families. This hair is in Ohisinm muscorum Leach, fairly long and 

 slender with a few ventral teeth near to the middle and with a number of teeth 

 near to the tip; there seems to be differences between the anterior and the posterior 

 hair of the same tarsus, as well as between those of the tarsi of the first and the 

 fourth pair of legs. The corresponding hair of Roiicus alpinus L. K. has an other 

 shape, being provided with a long ventral branch near the middle and a number 

 of teeth beyond. This hair, which may properly be designated the lateral terminal 

 hair of the tarsus, shows in the Pseudobisiinae Hans, specific differences of some 

 value; it is in Ideoroncus Siamensis n. sp. as well as in /. lamir^atus n. sp. fairly 

 long and slender, in the former of these species being bifurcate and in the latter 

 divided into three branches; in /. Mexicanus Bks. (21. pi- X, fig. If) and Ideobisium 

 Balzanii With (21. pi. X, fig. 2 h) the corresponding hair has the margin serrated 

 distally. 



The lateral terminal hair shows in Chelifer Geof. a great number of modi- 

 fications (cf. below); in most species it is only a pointed hair, which is more or 

 less distinctly curved upwards in the middle f. inst. in Ch. Indiens n. sp. and Ch. 

 Hawaiiensis Sim. (21. pi. VII, figs. 1 d-e); but in species of "Lophochernes Sim." it 

 attains its highest development, differing from the one species to the other. The 

 posterior hair is generally slightly curved upwards in the middle, and is dorsally 

 provided with a small tooth, beyond which it becomes fairly slender and is curved 

 downwards with the pointed tip directed upwards and forwards (PI. Ill, fig. 1 i, he, 

 fig. 6h); the anterior hair is as a rule shorter and curved upwards from base to 

 tip, whereas the terminal part beyond the small dorsal tooth is straight and directed 

 downwards (PI. Ill, figs. 1 h-i, hi); a similar structure more simple or more com- 



