438 ^'K. B. I. POCOCK OK SOME OLD-WOKLD 



toides, and I. imignis. Erom these, however, it may be at OBce 

 recognized by its keelless bauds and cephalotborax and its spurred 

 posterior tibi». Of tlie Oriental species it appears to come nearest 

 to I. scutilus of Kocb, but the two may be separated by tlieir 

 marked difference in colour, the number of pectinal teeth, &c. 



ISOMETRIJS INnrSCATUS, sp. n. 



Colour (dry specimen) very deeply infuscate throughout ; 

 upper surface of the trunk, the tail above and below, and anterior 

 surface of limbs obscurely variegated with fulvous spots and 

 bands. 



Gephalothorax lightly emarginate in front, covered more or less 

 completely, but not particularly closely, with low rounded granules, 

 which are smaller and more scattered on the auteocular area ; 

 ocular tubercle well developed, smooth and excavated between 

 the eyes ; distance between the eyes greater than a diameter. 



Tergites somewhat coarsely granular throughout, the granules 

 coarser and more close-set posteriorly ; each of the first six 

 marked with a relatively long median granular keel ; the seventh 

 with a conspicuous median, anterior, granular prominence and 

 two well-developed granular keels on each side. 



Sternites : first two smooth, third weakly granular at the sides, 

 fourth weakly granular at the sides and behind, smooth only in 

 the middle in front, the fifth weakly granular throughout and 

 furnished with four subequal granular keels. 



Tail robust, shallowly excavated above ; intercarinal spaces 

 very weakly granular ; the terminal granule of the superior keels 

 large and tuberculiform ; the first and second segments furnished 

 with ten evenly granular keels, the median lateral keel of the 

 second segment, how^ever, being considerably weaker than the 

 rest ; the third and fourth segments furnished with eight, aud 

 the fifth with five evenly granular keels. Vesicle smooth above, 

 serially granular beneath ; the subaculear tooth large, compressed, 

 and armed with a distinct tubercle. 



Falp. — Humerus weakly granular above and behind ; the supe- 

 rior keels manifest but not coarsely granular ; anterior surface 

 furnished with a few large tubercles and bounded below by a 

 weakly granular keel. Bracliium above furnished with two 

 weakly granular keels, subcostate but not granular behind, den- 

 tate in front, smooth below. Mamos not carinate, rounded and 



