98 On the Species of the Genus Alipes. 



Jan. 1896). It is, furtlier, interesting to note that tliis new- 

 species in its remarkable sexual character approaches the 

 South-American Parotostigmus scahricauda{HMmh. & Sauss.). 



Synopsis of the known Species of the Genus. 



a. Femur of the anal leg with a tuberculiforin 



spine (? $ ) or a long curved process at its 

 base on the inner side (? c? ) ; the plates upon 

 distal segments relatively small, apparently 



very much as in Grandidieri appendiculatus, sp. n. 



(Nyasaland.) 



b. Femur of anal leg armed neither with a spine 



nor a process. 

 a^. Crests on the tibia of anal leg small, their 

 height from point to point equal to only 

 about half the median length of the seg- 

 ment ; height of protarsus similarly much 

 less than its median length ; tergal plates 

 very obsoletely granular (teste Lucas) .... Grandidieri, Lucas. 



(Zanzibar.) 

 ¥. Crests on the tibia of anal leg much larger; 

 height of segment from angle to angle 

 nearly equal to its median length ; pro- 

 tarsus also nearly as high as long (at least 

 in the adult) ; tergal plates thickly studded 

 with spicules. 

 a^. Stouter form, the sutural crests on the 

 terga very much larger than the median ; 

 tibial expansions of the anal leg smaller 

 as compared with those of the protarsus, 

 so that the height of the former is only 

 about two-thirds the height of the latter, crotalus, Gerst. 



(Natal.) 

 6'. Slenderer form, the median tergal crest 

 not very much smaller than the sutural 

 crests; tibial expansion of anal leg rela- 

 tively larger and the protarsal smaller, 

 the height of the former being about 



five-sixths that of the latter rmdticostis, Imhoff. 



(Gold Coaat, Came- 

 roons.) 



In addition to the specimens mentioned above the British 

 Museum has others which, having lost their anal legs, as so 

 often happens, it is not possible to identify. Two of these 

 from Kinyaniholo, Lake Tanganyika [W. H. Nutt), are of 

 great interest on account of the weakness of the wrinkles, crests, 

 and spicules on the terga. It is only in the posterior half of 

 the body, in fact, that this sculpturing is at all strong. These 

 specimens are the only ones seen by me which, as compared 

 ■with the rest of the genus, fall in with Lucas's definition 

 " trfes-obsol^tement granul^e." It is, of course, very possible 



