16 H. J. HANSEN. 



pauperata, n. sp.^ but tliey are somewhat longer or even 

 rather long in the other species o£ the last-named genus. 



The legs of the first pair are always at least somewhat 

 shorter than the following pair^ and instead of tibia and 

 metatarsus only one joint is present between femur and 

 tarsus. In all species of Scutigerella and in Scolopen- 

 drella notacautha, Gerv., this first pair are still rather 

 large; in some other species of Scolopendrella they are more 

 reduced in size or even shorty but the three protruding joints 

 are plainly seen (PI. 5, fig. 4 /; PI. 6, fig. 3 e). In many 

 species of the last-named genus they have been reduced to 

 very small or exceedingly small wart-like protuberances {see, 

 for instance, PL 6, figs. 4 e and 6 c), without any vestige of 

 articulation, without claws, and often very difficult to discover. 

 When these legs are divided into joints the tarsi terminate in 

 two claws, of which the anterior one is generally proportion- 

 ately more slender and less curved than in the following 

 legs, and the relative length of the claws presents a specific 

 character. 



In all legs the prgetarsus has on the anterior side a single 

 seta, which is much longer than its hairs, and sometimes 

 (Scut, capensis, n. sp.) even longer than the claws (PI. 3, 

 fig. b d) ; it is here named the front seta. In the first pair 

 of legs it is sometimes very thick and almost claw-like, which 

 is a good character. 



V. Cerci. — Both the shape and the furniture with seta) 

 present good characters. At the distal end they are always 

 cut off obliquely, so that a conspicuous flat area is presented; 

 in Scolopendrella this area turns downwards or outwards, in 

 Scutigerella outwards or partially oi- wholly upwards; its 

 direction is always a good specific character if the natural 

 position of the cerci has not been disturbed by pressure, 

 which is the case in a small percentage of the specimens. 

 Furthermore, in Scolopendrella the dimension of this area is 

 valuable. In Scutigerella neither the area itself nor the 

 surface opposite to it present any stripes; in Scolopen- 

 drella uotacantha the area luis a number of somewhat 



