87 



only say that I should at once have adopted his opinion if G-ervais' 

 description had been the only one that exists of the species. But 

 since Simon has told us that there are four keels on the last abdominal 

 sternite, that the last three sternites are evidently granular and that 

 the ante-ocular portion of the cephalotorax is not infuscate, I can not 

 but think that it is distinct from our mucronatus. For all the specimens 

 of mucronatus that I have seen have the céphalothorax deeply infus- 

 cate in front , the third and forth sternites entirely smooth and certainly 

 what Simon would describe as only two keels on the fifth sternite. 



The distribution of this species is very wide — Madagascar ! ) (Ger- 

 vais) , Japan (Mus. Brit.) , China , Sunda Islands , Philippines (Kraepe- 

 lin), Burma (Thorell, Mus. Brit.), Java (Simon, Koch, Mus. Brit.), 

 Sumatra (Simon), Cambodia (Mus. Brit.), Siam, Cochin China (Simon), 

 Flores and Saleyer (Max Weber), New Zealand (Thorell). 



2. Isometrus flavimanus, Thorell. (PI. VI. fig. 2— 2a). 

 Ann. Mus. Genov. (2), VI, p. 409. 



Three specimens , two adult Q and one young, from Singkarah (Suma- 

 tra). Dr. Thorells' type was from Ajer Mantjur in the same island. 



The general tint of the upper surface is fuscous, with a clearly 

 defined though not conspicuons > shaped paler mark on the tergites. 

 The pectinal teeth vary from 15 to 17. 



The length of the largest specimen is 42 mm. The specimen des- 

 cribed by Dr. Thorell was a joung cf 1 measuring only 33 millim. in 

 total length, and possessing 19 pectinal teeth. 



The species that I described as hosei 2 ) from Baram in Sarawak is, I 

 find, very closely related to, even if it be not identical with this species. 

 Indeed apart from the colouring it is hard to find any valuable differen- 

 tial characters. /. hosei is of a uniform deep black on the tail and upper 

 surface of the trunk, the hand and vesicle being rufopiceous and the 

 legs not variegated as in flavimanus. Moreover the last abdominal ster- 

 nite has four conspicous granular keels; whereas in I. flavimanus the 

 external keels are nearly obsolete. But these characters will , I suspect, 



1) In his original description of curvidigitatus in vol. IV of the Arch. Mus., Gervais 

 states that the locality is Madagascar, although in the Ins. Apt. p. 48 he says „Ori- 

 gine inconnue". 



2) Journ. Linn. Soc. Zool. XXIII, 436—437, pi. XXIII, fig. 2. 



