40 BUTHTB.E. 



26. Lychas tricarinatus, Simon, Ann. Mus. Genova, xx, p. 371, 



1884; Pocock, Jour. Linn. Soc, Zool, xxiii, p. 433, 1890 (Iso- 

 nietrus) ; Kraep. Jb. Hamb. iviss. Anst. viii, p. 227, 1891 ; Pocock, 

 Jour. Bom. N. H. Soc. vii, p. 301, 1892 ; Kraep. Tierr., Scorp. 

 etc. p. 50, 1899 (Archisometrus). 



Colour variable, sometimes tolerably uniformly brownish yellow 

 throughout, sometimes blackish varied with yellow, but not so 

 strongly as in L. mucronatus, no black anteocular triangle as in 

 that species. Carapace with its anterior border less emarginate 

 than in L. mucronatus and L. scutilus. Terga 3-6 with distinct 

 though short lateral crests. Last sternum with 4 finely granular 

 crests. Tail of much the same form as in L mucronatus, about 

 five times as long as the carapace ; the sides of the segments 

 more convex, the median lateral keel on the 2nd stronger, and 

 a distinct supero-lateral granular keel on the 5th ; vesicle very 

 small, much smaller than in L. mucronatus, but more coarsely and 

 more serially granular below. Chela' with crests on brachium 

 weaker ; hand without keels, narrow ; fingers very short, movable 

 much shorter than carapace, longer than the underhand by 

 only one-fourth of its length, furnished with 6 rows of teeth, the 

 basal row long, but not half the length of the finger. Legs with 

 very long tibial spurs. Pectinal teeth 21-25 ( £ , 3 ). 



cj differs from $ in having the tail much longer, six or more times 

 the length of the carapace, the width of 1st segment about two-thirds 

 of its length ; carapace only slightly longer than the 1st caudal 

 segment, and much shorter than the 4th. Hand a little wider 

 than the brachium ; fingers not quite in contact at the base, the 

 movable furnished with a lobe which fits into a sinuation of the 

 immovable. 



Measurements in mm. (specimen from Madras). — $ . Total length 

 57, carapace 6, tail 32, finger 4*5. J • Total length 54, carapace 

 5, tail 35. 



Distribution. Central and South India ; Bhopal (Dane) and 

 Xamptee (Caccia), Belgaum, Kanara (Bell), Mangalore (Battie), 

 and Trivandrum (Ferguson), Tanjore and Nellore (Popert). Madras 

 (Henderson) and Pondicherry ; Yercaud in the Shevaroy Hills 

 (Henderson), Nilgiri Hills (Daly). 



Representatives of this species from the lowlands of the Madras 

 Presidency (i. e. Madras, Nellore, and Tanjore) are paler in colour 

 than those that are met with in the Deccan, Central India, the 

 Malabar coast, and the hilly areas of the Caruatic. 



27. Lychas hendersoni, Pocock, Jour.' Bom. N. JI. Soc. xi, p. Ill, 



1897; Kraep. Tierr., Scorp. etc. p. 51, 1899 (Archisoinetrus). 



Allied to I j. tricarinatus in having the tibial spurs long and the 

 cephalothoracic sternum small and indented throughout its length. 



Colour : carapace black and yellow in about equal proportions ; 

 two pale spots on the front border as in L. tricarinatus ; terga 

 with median yellow patch, yellow > < -shaped marking, yellow 



