298 Mr. R. I. Pocock on some new or 



sometimes also there is a notch or depression at the distal 

 end of the lower side of the fifth. 



Genital operculum with its posterior border transversely 

 emarginate in its middle third, marked on each side with a 

 pair of posteriorly converging groove-like depressions ; middle 

 of anterior portion lightly depressed on each side, the de- 

 pression empliasizing a low tuberculiform eminence. 



Total length 45 millim. 



Loc. Lacan, via Raheng in Siam. 



Two adult males and two females sent with an example of 

 Thelyphonus Schimkewitschii by Mr. Mahon Daly, to whom 

 I have great pleasure in dedicating this fine new species. 



Allied to T. niger (Tarn.) from China, but at once recog- 

 nizable by the very weak spine-armature of the trochanter of 

 the chela and the greater number of spines on the clubbed 

 tip of the tibial apophysis in the male. 



The female of T. niger is unknown ; that of T. Dalyi 

 differs from that of T. Stimpsonii^ Wood, in having the 

 teeth on the trochanter of the chela smaller, the apophysis 

 much thicker, and the genital operculum without a median 

 impression. 



Kraepelin's table of the males of this genus may be now 

 supplemented as follows : — 



a. Tibial apophysis straight, attenuate, apex not 



expanded ; inner edge of hand and immovable 



finger straight amurensis. 



b. Tibial apophysis bent, apex clubbed ; inner edge 



of hand and immovable finger sinuous. 



a}. Anterior border of upperside of trochanter at 



most armed with a small denticle, inner edge 



of hand without an internal basal prominence. 



rt^. Tibial apophysis armed apically with a series 



of about 10 small and 1 large inferior teeth ; 



inner angle of trochanter armed with 3 



small denticles Dalyi. 



b"^. Tibial apophysis only armed with 3 apical 

 teeth ; trochanter armed on its inner angle 



with 1 large and 2 smaller teeth niger. 



I?. Anterior border of upperside of trochanter 



armed with a large tooth, longer than the 



angular tooth ; inner edge of hand with strong 



basal prominence. 



a'. Anterior vertical edge of trochanter armed 



with a series of 3 small subsimilar teeth 



below the large superior tooth crucifer, Poc. 



i'. Anterior vertical crest of trochanter armed 

 with only 2 teeth below the superior large 

 tooth, the upper of the two large, quadrate, 

 and bifid Siimpsonii, Wood. 



