132 Mr. E. I. Pocock on the 



patella 5, last three segments (foot) 5" 2 ; length of genital 

 operculum 5*5, width 93. 



A single (probably female) example from Brazil. 



This species seems to be most nearly related to Th. pro- 

 scorpio (Latr.) ; it may be at once recognized, however, by 

 the spine-armature of the trochanter of the chela, this segment 

 being peculiar in having only one large inferior spine. More- 

 over the absence of spines on the femur is peculiar ; and the 

 spine at the base of the tibial apophysis is unusually promi- 

 nent. Mention may also be made of the parallelism between 

 the two maxillary processes of the coxae. 



Mimoscorpius, gen. nov. (PI. IT. fig. 6.) 



Carapace like that of Thelyphonus, but there is no distinct 

 ridge between the median eyes. 



Genital operculum of male twice as wide as long, without 

 trace of a median sulcus, laterally swollen, its posterior border 

 mesially convex ; the second sternum without a median spine. 



Palpi in male peculiar; femur long, nearly cylindrical, 

 almost four times as long as thick, with a single small inferior 

 tuberculous spine on its anterior surface ; the tibia about half 

 the length of the femur and of about the same thickness, the 

 apophysis very long and slender ; the tarsus or hand twice 

 as thick as the femur and flattened, its apophysis stout and 

 strongly curved at the apex. 



This genus is established for the reception of Th. pugnator 

 of Butler *j from the Philippine Islands. The female of this 

 species is unfortunately unknown, but the male differs in 

 well-marked characters, both sexual and asexual, from the 

 remaining species of the group. I have consequently not 

 hesitated to regard it as a distinct genus. 



Labochikus, gen. nov. 



Carapace without cephalic keels and without an upstanding 

 ridge between the eyes as in Hypoctonus. 



The coxal apophysis of the chela with a distinct internal 

 spiniform tooth. 



Genital operculum of male swollen, not sulcate, a process 

 on the posterior border of the second. Genital operculum of 

 adult female with a pair of tubercular elevations, its hinder 

 border produced. 



Type and sole known species L. proboscideus, Butler, from 

 Ceylon, of which the following is the synonymy : — 



* Ann. & Mag. Nat. Hist., Sept. 1872, p. 204, pi. xiii. fig. 5. 



