Thelyphonidoe in the British Museum. 129 



middle, with a short median rounded prominence in the middle 

 of the emargination. This emargination leaves much more 

 of the second segment uncovered than is seen in Th. Stimp- 

 sonii, sinensis, and amurensis. 



Palpi like those of my specimens of Stimpsonii, but with 

 the posterior tooth on the inner edge of the trochanter present, 

 and with three teeth before the apex on the posterior border 

 of the tibial apophysis. Tarsus of first leg with the segments 

 distally decreasing in length almost as in T. Stimpsonii, 

 distally incrassate, the eighth and ninth segments deeply 

 notched below. 



Measurements in millimetres. — Total length 38, length of 

 carapace 14; first leg, femur 9*5, patella 12*5, tibia 12, 

 tarsus 8 ; fourth leg, femur 10'7, patella 4*5, tibia 10*7, 

 tarsus 7. 



Three female specimens, without locality. 



Uroproctus, gen. nov. (PL II. figs. 7, 7 a.) 



Carapace like that of Thelyphonus. 



The apophysis of the coxa of the chelse with its inner edge 

 straight and armed with a distinct spine, the whole process 

 gradually narrowed towards the tip. 



The genital operculum of the male not large, swollen at the 

 sides, but without median groove ; no spine on the second 

 abdominal plate ; the genital operculum of the female almost 

 like that of Theli/phonus. 



Tarsi of first leg in female unmodified. 



Type and only known species is Th. assamensis, Stoliczka, 

 of which the following is the synonymy : — 



Thelyphonus assamensis, Stol. J. A. S. Bengal, 1869, pi. ii. p. 205 ; 



id. op. cit. 1873, pt. ii. p. 133. 

 Thelyphonus scabrinus, id. loc. cit. p. 130 (teste Oates). 

 Thelyphonus ruftma?ius, Lucas, Butler, Ann. & Mag. Nat. Hist., Sept. 



1872, p. 202 (not rufimanus of Lucas). 

 Thelyphonus proscorpio, Latr., Butler, ibid, (not proscorpio, Latr.). 

 Thelyphonus psittacinus, Butler, Cist. Ent. vi. p. 129 (1873). 



Loc. Assam, Sikkim. 



This species differs from all the species of Thelyphonus 

 (s. s.) in the different form of the genital operculum in the 

 male and in the shape of the coxal apophysis of the chela, 

 this process in Thelyphonus being stout, with its inner edge 

 unarmed and abruptly narrowed at the apex. 



Mastigoproctus, gen. nov. 

 Differs from Thelyphonus principally in the characters con- 

 Ann. & Mag. N. Hist. Ser. 6. Vol. xiv. 9 



