Scorpions and Centipedes from Madras. 243 



and above by a subtubercular or subgranular ridge, the basal 

 prominence armed with two larger and sometimes a few 

 smaller teeth, each of the larger teeth bearing a setiferous 

 pore. Hand thickly punctured above, smooth or subrugulose, 

 distinctly though sparsely granular in front, smooth below 

 and somewhat coarsely granular behind, the " hand-back " 

 defined above and below by a conspicuous subgranular keel. 

 Movable dactylus slightly or considerably shorter than the 

 " hand-back," with a feebly developed lobe at the distal end 

 of the inner surface ; when the dactyli are closed a corre- 

 sponding but less well developed lobe on the immovable 

 dactylus fits in front of that on the movable dactylus. 



Femora of the first three pairs of legs furnished beneath 

 with a posterior long and an anterior short series of granules ; 

 femora of the fourth pair granular beneath only at the distal 

 extremity. 



Pectines with, as a rule, five teeth, rarely four or six, and 

 in one instance only three. 



Stigmata slit-like. 



The genital operculum in the female without trace of median 

 suture, the right and left halves having coalesced to form a 

 plate, very much wider than long, with angularly produced 

 posterior margin. 



Measurements in millimetres of a $ specimen. — Total length 

 55 ; cephalothorax, length 8, width 8*5 ; tail, length 25 — 

 first segment 3, second segment 35 (taken together 7), fifth 

 segment 5*4 ; vesicle and aculeus, length 6 ; humerus, length 

 7; brachium, length 7'5; "hand-back," length 9 ; width of 

 hand 5'5 ; movable dactylus, length 7. 



A number of specimens of various ages and both sexes. 



This species is closely allied to H. caudicula, L. Koch, a 

 species found in the Australian and Austro-Malayan region. 

 H. Icevicejos, however, may be recognized by being almost 

 wholly smooth (H. caudicula having distinctly sculptured 

 tergites and coarsely granular cephalothorax and palpi), in 

 having the median eyes much smaller and not situated on an 

 eminence, in having the form of the dactyli the same in the 

 two sexes, and in having the genital operculum in the female 

 of a different shape (in caudicula this plate bears distinct 

 traces of the median suture, is more heart-like in shape, less 

 angularly produced behind, and less wide relatively to its 

 length) ; moreover, the ridge which forms the upper boun- 

 dary to the " hand-back " is more strongly developed. 



In addition to the series sent by Mr. Thurston from 

 Madras the British Museum possesses two specimens (^ $> ) 

 sent by Mr. W. Davidson from the Anamallai Hills, Koim- 



