34 BUTHLD.S. 



the dorsal groove behind the ocular tubercle, and the tergal plates 

 smooth and shining, not granular. Last sternal plate thickly and 

 finely punctured. Also the humerus is smooth and rounded in 

 front, not weakly crested and granular as in S. politus. Moreover, 

 judging by the figures published by Karsch, the length of the 2nd 

 caudal segment is much less than the width of the 4th. Length 

 up to about 40 mm. 



Loc. Ceylon : Peradeniya (Sarasin). 



Genus HEMIBUTHUS, nov. 



Intermediate in characters between ButTius and Lychas; re- 

 sembling the latter in the absence of keels from the carapace and 

 the presence of a single tooth on the under side of the immovable 

 finger of the mandible, and the former in the absence of a spine 

 beneath the aculeus of the caudal vesicle and in that the teeth of 

 the inner row on the fingers of the chelae alternate with those of 

 the outer row, being situated opposite the middle of the corre- 

 sponding rows of the median series. 



Type, H. crassimanus. 



Distribution. India. 



20. Hemifouthns crassimanus, Pocock, Jour. Bom. N. H. Soc. xi, 

 p. 110, 1897 ; Kraep. Tierr., Scorp. etc. p. 44, 1899 (Archisonietrus). 



Colour blackish brown, without distinct yellow pattern; tail 

 paler; vesicle, hands, and distal segments of legs clear yellow. 

 Carapace somewhat finely granular, more coarsely so on the 

 a,nterior border, its posterior border, like those of the anterior 

 terga, tri-emarginate ; nearly as long as the 1st and 2nd caudal 

 segments, and slightly longer than the 5th. Terga distinctly 

 though not very coarsely granular posteriorly ; with conspicuous 

 lateral crests. Sterna smooth and punctured, the last almost 

 without crests and granules. Tail of medium length and thickness, 

 barely five times as long as the carapace ; 1st segment as wide as 

 long, 4th one-fourth longer than wide ; intercarinal spaces sparsely 

 granular, punctured, keels strongly granular, median lateral repre- 

 sented on the posterior half of the 2nd and 3rd by a series of 

 granules, weak on the 1st ; vesicle nearly smooth, only sparsely 

 granular, punctured; angulate beneath the aculeus. CJielce with 

 hand smooth, rounded, large, much wider than brachiuin ; fingers 

 short, the movable about equal to the carapace and to the under- 

 hand in length ; with 8 rows of teeth. Pectinal teeth 12. 



S . With larger hand, and tail posteriorly incrassate ; pectinal 

 teeth 14-15. 



Measurements in mm. ( ) Total length 28, carapace 3, tail 

 14-5, width of hand 2. 



Loc. Western India: Panch Mahals in Guzerat (Wallinger). 



