112 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XL 



Abdominal terga. — Closely and finely granular throughout, without 

 trace of lateral keel. 



Sterna. — Smooth and polished, the fifth finely granular, and furnish- 

 ed with four keels. 



Tail. — Kobust, about four and a half times the length of the carapace, 

 intercarinal spaces finely granular, keels well developed, finely gran- 

 ular, terminal granule of upper keels not enlarged ; segments 1-3 

 furnished with ten keels, the median lateral keel on the third weak ; 

 the superior lateral keels on the fifth very sharply defined, the area 

 between them elevated, vesicle small, smoothly carinate below, aculeus 

 long, spine conspicuous. 



Palpi. — Normally keeled, finely granular ; brachium convex behind, 

 not keeled and almost smooth ; manus about as thick as the brachium ; 

 smooth and not keeled above ; digits long, contiguous, the movable 

 more than twice the length of the hand-back and armed with 6-7 

 median rows of teeth. 



Legs. — Normally keeled, granular j tibial spurs on the fourth and 

 fifth very long, about a third of the length of the succeeding segment ; 

 feet furnished below with two series of close-set hair. 



Pectinal teeth 17-18. 



Total length 34 mm, of carapace 3*5, of tail 18*5. 



Locality. — Yercaud, in the Sheveroy Hills (J. R. Henderson) ; a 

 single female example. 



This species belongs to the same category as Archisometrus tricari- 

 natus A. shoplandi and A. scaler. It differs from them in the follow- 

 ing respects. From A. tricarinatus in having no lateral keels on the 

 terga, in having a more conspicuous median lateral keel on the third 

 caudal segment, in having fewer pectinal teeth (17-18), as compared to 

 over 20 (21-25), and much longer fingers, etc. From A. shoplandi in 

 having the ante-ccular region of the carapace evenly and closely 

 granular like the rest of the surface, in having a well developed 

 supero-lateral granular keel on the fifth caudal segment, a smaller 

 number of pectinal teeth, etc.; from A. scaler in having very long in- 

 stead of very short tibial spurs on the third and fourth legs, in having 

 the external keels on the fifth abdominal sternite well developed, the 

 ocular tubercle granular, etc. 



I have great pleasure in dedicating this species to my friend Mr. 

 J. R. Henderson of the Christian College, Madras. 



