126 Mr. E. I. Pocock on the 



Measurements in millimetres. — Total length about 47, of 

 carapace ] 6 ; distance between lateral eyes and posterior 

 border of carapace 11 ; first pair of legs, femur 9, patella 12'2, 

 tibia 12, tarsus 7 ; fourth leg, femur 11, patella 5, tibia lO'o, 

 tarsus (three segments) 5. 



A single (dried) female from Billiton Island (off the S.E. 

 extremit}^ of Sumatra) . 



From the above measurements it may be seen that in the 

 legs of the last pair the tibial segment is shorter than the 

 distance between the lateral eyes and tlie posterior border of 

 the carapace (11: 10*5), whereas in Hosei the segment is 

 longer than the above distance {i. e. 13 : 15). Similar com- 

 parisons will show that the segments of the legs of the first 

 pair are shorter in Th. Tarnanii. 



Typopeltis, gen. nov. 



Allied to ThelypJionus (s. s.), but the genital operculum of 

 the female having its middle third elevated and deeply 

 mesially impressed, while the posterior border of the median 

 area is not evenly rounded. 



Type Th. crucifer^ sp. n. 



I also refer to this genus Th. sinensis, Butler, and the 

 species that I identify as Th. Stimpsonii oi AVood. I suspect, 

 too, that Th. amurensis of Tarnani will come in here. 



Loc. China, Japan, &c. 



Typopeltis Stimpsonii, Wood. (PL II. figs, o, 3 a.) 



Thelyphontis Stimpsonii, Wood, Proc. Ac. Pliilad. 1862, p. 312. 



Colour black; tarsi, flagellum, and lower surface ferru- 

 ginous. 



Cai-apace densely punctured in its anterior portion and 

 lightly transversely wrinkled, covered in its posterior two 

 thirds with rounded granules, the impressions not deep, the 

 margin finely serrate, anteriorly studded with set£e ; a pair of 

 setse on the ocular tubercle behind the eyes, another pair in 

 front of the tubercle ; the ocular keel complete, i. e. running 

 from the lateral eyes and curving round to the front margin 

 of the tubercle, which is smooth ; the area between the 

 summit of the tubercle and the middle of the front border 

 sloping at an angle of about 50°, the area lying below the 

 ocular keel vertical posteriorly. The median eyes black, 

 the lateral amber-yellow • no accessory eyes. 



Abdomen densely punctured above and covered thickly with 

 low rounded granules ; the last segment of the postabdomea 

 shining, weakly granular ; the ommatoids a little smaller 



