41 



homologous to one, which, in at least most species of the Paiictenodacli/Ii, is placed 

 ventrally just behind the articulate membrane on the anterior surface, makes the 

 conclusion acceptable, that it is only the limitation of the trochantin, which has 

 been abolished, not the trochantin itself (PI. IV, fig. 14 b). 



V. Tarsi. 



Tarsus I. The tarsus is the joint, which after the femurs sliows the greatest 

 and most intcrresting variations. The tarsi of the two first pair of legs are one- 

 jointed in the Chthoniidae Hans, and the Cheliferidae Hans, and two-jointed in the two 

 other families. The tarsus or the tarsi of the two first pair of legs seem always 

 to be longer and sometimes much longer than the tibia in the Hemictenodactyli; it 

 is f. inst. in Chthonius terribilis n. sp. twice longer than the tibia (PI. I, fig. 1 I), and 

 in Obisiiiiu muscorum Leach. 16 longer than the tibia; but the most marked varia- 

 tions in this respect are to be found in the subfamily of the Psendobisiinae Hans. 

 Ideoronciis Siamensis n. sp. has f. inst. the tarsi Iw longer than the tibia (PI. I, 

 fig. 4Ii-i), while it is only 13 longer in /. laniinatiis n. sp. The tarsus II seems 

 always to be the longer of the tarsal joints, when two are present ; in Blothriis 

 spelaeus Sch. the second joint is only a trifle longer than the first. In this respect 

 it is also the Psendobisiinae Hans, which provides the most numerous variations; 

 in Ideoronciis Siamensis n. sp. f. inst. we have the 

 second tarsal joint P4 times longer than the first 

 (PI. I, fig. 4 h), while in /. Mexicanus Bks. the former 

 of these joints is 25 longer than the latter (21. pi. X, 

 fig. 1 d). 



If the tarsi of the Garypidae Hans, are examined, 

 even better marked variations are found; the combined 

 tarsi are sometimes as f. inst. in Garypiis irrugatus Sim. 

 longer than the tibia (PI. II, fig. 1 c), sometimes shorter 

 or of equal length f. inst. in Garypinus nobilis n. sp. 

 (PI. I, fig. 8 f ). The two tarsal joints are sometimes 

 of almost equal length as in Garypiis irrugatus Sim. 

 (PI. II, fig. 1 c), and sometimes we have the second joint 

 much longer as in Garypinus nobilis n. sp. (PI. II, fig. 8 f) 

 or Olpium Birmanicurn n. sp. (PI. II, fig. 7 f) or the basal 

 joint the longer f. inst. Garypus Floridensis Hks. and 

 Olpium n. sp. from Queeensland (fig. 9a-b). Within the 

 Cliiliferidae Hans, the variations are as marked as in 

 the last mentioned family. The tarsus of Chelifer Geof. seems never to be longer 

 than the tibia, sometimes as long f. inst. in Ch. Mortensenii n. sp., but most often 

 shorter f. inst. in Ch. Indiens n. sp. (PI. IV, fig. 10 c): the tarsus of the first pair of 

 legs is in Pseiidochiridium Thorellii n. s[). (PI. IV, fig. 12 f ) longer than the tibia and 

 so it is in Chiridiiim miiseorum Leach, bul in a less degree (PI. IV^ fig. 14 a). 



n. K. n. Viilensk. Sclsk. Skr, 7. H:i'kk.-, niituiviilcnsk. oK miillicm. AW. III. 1, 6 



Fig. 9. Garypus Floridensis Bks., 

 J X 20. Left leg I (a), leg IV (b). 



