SCORPTON'S OF THE UENUS TSOMETRTJS. 435 



iu I. SJioplandii seems to be more slender, and tlie terminal 

 granule of tbe superior keels not larger than the rest. 



Whetljer these difterenees will stand the test of an examination 

 of a number of specimens from intermediate localities is a question 

 which, for the present, must be left unanswered. 



There is also in the Museum a single dried and apparently 

 young female specimen of an Isometrus which came from Calcutta. 

 This specimen differs from the type of I. Shoplandii in having no 

 trace of lateral tergal keels and distinctly longer manus and digits; 

 these taken together being longer than thefirst two caudal seg- 

 ments, whereas in I, Shoplandii they are slightly shorter. I have 

 very little doubt, however, that it is referable to this species. 



On ISOMETBUS SCUTILUS (C. Kocli), 



Syn. Lychas scutilus, C. Koch, Die Arachn. xii. p. 3, fig. 962 (1842). 

 Isoraeti'us Weberi, Karsch, Berl.ent. Zeits. xxvi. p. 184 (1882). 

 Isometi-us messor, Simon, Ann. Mus. Genov. xx. pp. 4/, 48 (1884). 

 Isometrus Phipsoni, Oates, Journ. As. Soc. Bombay, iii. p. 248, 

 figs. 1 &2 (1888). 



Tenasserim (Oates), Salanga (Mus. Brit.), Bintaug (Koch), 

 Java (Simon), Keeling Island (Thorell). 



There seem to me to be very strong grounds for suspecting, with 

 Dr. Thorell *, that I. Phijjsoni is synonymous with/, scutilus. 

 Undoubtedly, to judge from the figure and description of the 

 latter, the two forms differ in colour ; but those who are familiar 

 with Koch's work will know what confidence is to be placed iu 

 the accuracy of the painting of the figures and in the wording of 

 the descriptions. 



In shape, length of tail and of appendages, &c., the figure of 

 scutilus agrees well with the female of Fhipsoni (of which, 

 through the liberality of Mr. Oates, the Museum possesses 

 many examples from Tenasserim) ; and the view that the 

 two are identical is much strengthened by the fact that the 

 Museum possesses in addition a specimen of Isometrus (ohyioaslj 

 co-specific with the specimens named Phipsoni) from Salanga, a 

 locality relatively so close to Bintang, whence the type of scutilus 

 came. 



However that may be with regard to scutilus, there is no ques- 

 tion that the British-Museum specimen from Salanga is J. TFeJm, 



* Ann. Mus. Genov. (2), vii. p. 525 (1889-1890). 



31* 



