86 BTJTHID.}:. 



b 1 . Tibial spurs of 3rd and 4th legs short, 



scarcely longer than the hairs of the tibia. 



a 6 . Abdominal sterna thickly marbled 



with black L. nic/ristenris, p. 38, 



b 6 . Abdominal sterna, with exception of 



the 5th, uniformly pale yellow. 

 a'. Last abdominaf sternum with four 

 granular keels ; hand with two 



granular finger-keels L. scutilus, p. 37. 



b". Last abdominal sternum with only a 

 pair of distinct keels ; hand only 

 obsoletely keeled 



a*. Chelae and legs uniformly yellowish 

 brown ; movable finger much 

 longer than carapace ; fingers 



scarcely sinuate in J L. scuber, p. 38. 



b 8 . Chehe and legs variegated black 

 and yellow ; movable finger only 

 slightly exceeding carapace ; 

 fingers strongly sinuate in J .... L. mucronatus, p. 36. 



21. Lychas mucronatus, Fabr. But. Syst. Suppl. p. 294, 1708 (Scorpio) ; 

 Thorell, Ann. Mus. Genovn, xxvii, p. 566, 1881) (Isometrus) ; Pocock, 

 in Weber, Reise Niederl. O.-Ind. iii, p. 85, pi. vi, fig. 1, 1893; 

 Thorell, Bull. Soc. ent. Ital xxv, p. 368, 1894; Kraep. Tien:, 

 Scorp. etc. p. 46, 1899 (Archisometrus) ; Kraep. Jb. Hamb. 

 wiss. Ami. viii, p. 223, 1891 (Archisometrus) : varius, C. Koch, 

 Arachn. xi, p. 29, fig. 864, 1845 (Tityus) ; Simon, Ann. Mus. 

 Genova, xx, p. 362, 1884 ; Oatcs, Jour. Bom. 'N. H. Soc. iii, p. 245, 

 1888 (Isometrus) : atomarius, Otttes, Jour. Bom. N. H. Soc. iii, 

 p. 245, 1888 (? atomarius, Simon, Ann. Mus. Genov. xx, p. 363, 

 1884) (Isometrus). 



Colour yellow varied with black : carapace with ocular tubercle 

 and interocular triangle black, the rest of it marked with irregular 

 greyish-black lines ; terga black in the middle along the keel, a black 

 patch interrupted by a yellow > -shaped mark on each side, and 

 six yellow spots separated by black spaces ; sterna yellow, with a 

 blackish patch on each side; tail darker posteriorly, the lower 

 surface lined with black, the posterior ends of the segments 

 blacker than the anterior; vesicle uniformly deep brown ; mandibles 

 black; huinerus of chela mottled with black above ; brachium mostly 

 black above, yellow at the base ; hand yellow, with a few small 

 spots ; basal half of fingers black, distal end yellow. 



2 . Carapace a little shorter than 5th caudal segment, as long 

 as 1st and half the 2nd, granular throughout. Terc/a granular 

 throughout, with single median granular keel. Sterna smooth, 

 except the last, which is closely granular and furnished with a pair 

 of median granular keels, the lateral keels obsolete. Tail about 

 five times as long as the carapace, finely granular ; 2nd segment 

 almost as wide as long, 4th not twice as long as wide : median 

 lateral keel present, but weak on the 2nd segment ; vesicle granular 

 below ; spine beneath aculeus triangular, pointed. Chelce finely 

 granular, with granular crests ; hand almost smooth, with obsolete 



